diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a15760b5a..2771ece37 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -14,7 +14,7 @@ jobs:
       - name: Checkout the repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Install pnpm
-        uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
+        uses: pnpm/action-setup@8912a9102ac27614460f54aedde9e1e7f9aec20d # v6.0.5
         with:
           version: 11
       - name: Install Node.js
@@ -38,7 +38,7 @@ jobs:
       - name: Checkout the repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Install pnpm
-        uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
+        uses: pnpm/action-setup@8912a9102ac27614460f54aedde9e1e7f9aec20d # v6.0.5
         with:
           version: 11
       - name: Install Node.js ${{ matrix.node-version }}
@@ -66,7 +66,7 @@ jobs:
       - name: Checkout the repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Install pnpm
-        uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
+        uses: pnpm/action-setup@8912a9102ac27614460f54aedde9e1e7f9aec20d # v6.0.5
         with:
           version: 3
         env:
@@ -88,7 +88,7 @@ jobs:
       - name: Checkout the repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Install pnpm
-        uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
+        uses: pnpm/action-setup@8912a9102ac27614460f54aedde9e1e7f9aec20d # v6.0.5
         with:
           version: 10
       - name: Install Node.js LTS
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d502ec656..aa7eb91a4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 This project adheres to [Semantic Versioning](https://semver.org/).
 
+## 8.5.14
+
+- Fixed custom syntax regression (by @43081j).
+
 ## 8.5.13
 
 - Fixed `postcss-scss` commend regression.
diff --git a/lib/processor.js b/lib/processor.js
index bb07d537d..eabcd9f12 100644
--- a/lib/processor.js
+++ b/lib/processor.js
@@ -7,7 +7,7 @@ let Root = require('./root')
 
 class Processor {
   constructor(plugins = []) {
-    this.version = '8.5.13'
+    this.version = '8.5.14'
     this.plugins = this.normalize(plugins)
   }
 
diff --git a/lib/stringifier.js b/lib/stringifier.js
index 72a3f9319..b1aa835d8 100644
--- a/lib/stringifier.js
+++ b/lib/stringifier.js
@@ -85,23 +85,15 @@ class Stringifier {
   }
 
   block(node, start) {
-    let raws = node.raws
-    let between =
-      typeof raws.between !== 'undefined'
-        ? raws.between
-        : this.raw(node, 'between', 'beforeOpen')
+    let between = this.raw(node, 'between', 'beforeOpen')
     this.builder(escapeHTMLInCSS(start + between) + '{', node, 'start')
 
     let after
     if (node.nodes && node.nodes.length) {
       this.body(node)
-      after =
-        typeof raws.after !== 'undefined' ? raws.after : this.raw(node, 'after')
+      after = this.raw(node, 'after')
     } else {
-      after =
-        typeof raws.after !== 'undefined'
-          ? raws.after
-          : this.raw(node, 'after', 'emptyBody')
+      after = this.raw(node, 'after', 'emptyBody')
     }
 
     if (after) this.builder(escapeHTMLInCSS(after))
@@ -120,34 +112,21 @@ class Stringifier {
     let isDocument = node.type === 'document'
     for (let i = 0; i < nodes.length; i++) {
       let child = nodes[i]
-      let before = child.raws.before
-      if (typeof before === 'undefined') {
-        before = this.raw(child, 'before')
-      }
+      let before = this.raw(child, 'before')
       if (before) this.builder(isDocument ? before : escapeHTMLInCSS(before))
       this.stringify(child, last !== i || semicolon)
     }
   }
 
   comment(node) {
-    let raws = node.raws
-    let left =
-      typeof raws.left !== 'undefined'
-        ? raws.left
-        : this.raw(node, 'left', 'commentLeft')
-    let right =
-      typeof raws.right !== 'undefined'
-        ? raws.right
-        : this.raw(node, 'right', 'commentRight')
+    let left = this.raw(node, 'left', 'commentLeft')
+    let right = this.raw(node, 'right', 'commentRight')
     this.builder(escapeHTMLInCSS('/*' + left + node.text + right + '*/'), node)
   }
 
   decl(node, semicolon) {
     let raws = node.raws
-    let between =
-      typeof raws.between !== 'undefined'
-        ? raws.between
-        : this.raw(node, 'between', 'colon')
+    let between = this.raw(node, 'between', 'colon')
 
     let string = node.prop + between + this.rawValue(node, 'value')
 
diff --git a/package.json b/package.json
index 564aa23fa..f4203f432 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "postcss",
-  "version": "8.5.13",
+  "version": "8.5.14",
   "description": "Tool for transforming styles with JS plugins",
   "keywords": [
     "css",
@@ -101,9 +101,9 @@
     "actions-up": "^1.14.1",
     "c8": "^11.0.0",
     "check-dts": "^0.9.0",
-    "clean-publish": "^6.0.5",
+    "clean-publish": "^7.0.1",
     "concat-with-sourcemaps": "^1.1.0",
-    "eslint": "^10.2.1",
+    "eslint": "^10.3.0",
     "multiocular": "^0.8.3",
     "nanodelay": "^1.0.8",
     "nanospy": "^1.0.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index ba1cb0694..4bd549f65 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -20,7 +20,7 @@ importers:
     devDependencies:
       '@logux/eslint-config':
         specifier: ^57.1.0
-        version: 57.1.0(@typescript-eslint/utils@8.59.1(eslint@10.2.1)(typescript@5.9.3))(eslint@10.2.1)(typescript@5.9.3)
+        version: 57.1.0(@typescript-eslint/utils@8.59.1(eslint@10.3.0)(typescript@5.9.3))(eslint@10.3.0)(typescript@5.9.3)
       '@logux/oxc-configs':
         specifier: ^0.4.0
         version: 0.4.0(oxlint-tsgolint@0.18.1)(oxlint@1.58.0(oxlint-tsgolint@0.18.1))(typescript@5.9.3)
@@ -40,14 +40,14 @@ importers:
         specifier: ^0.9.0
         version: 0.9.0(typescript@5.9.3)
       clean-publish:
-        specifier: ^6.0.5
-        version: 6.0.5
+        specifier: ^7.0.1
+        version: 7.0.1
       concat-with-sourcemaps:
         specifier: ^1.1.0
         version: 1.1.0
       eslint:
-        specifier: ^10.2.1
-        version: 10.2.1
+        specifier: ^10.3.0
+        version: 10.3.0
       multiocular:
         specifier: ^0.8.3
         version: 0.8.3
@@ -967,9 +967,9 @@ packages:
     peerDependencies:
       typescript: '>=4.0.0'
 
-  clean-publish@6.0.5:
-    resolution: {integrity: sha512-Iqm/EDPQFLY0I8kktg61Nt8V/5fiXYNkNR5UsHcLKmj4vp7a0a7EGZmNEbN2Hg77frQlHNljT/MruK5Wr/Rtog==}
-    engines: {node: '>= 20.0.0'}
+  clean-publish@7.0.1:
+    resolution: {integrity: sha512-Fr4c1dg6kEG4juBo2IMbft0w8inX0QTsbkRWIy5R0jZGWswQIpgOW0yfqV7bmyxn1F1eQtm9VBy5VDyB3go8WQ==}
+    engines: {node: '>= 22.0.0'}
     hasBin: true
 
   cliui@8.0.1:
@@ -1132,8 +1132,8 @@ packages:
     resolution: {integrity: sha512-tD40eHxA35h0PEIZNeIjkHoDR4YjjJp34biM0mDvplBe//mB+IHCqHDGV7pxF+7MklTvighcCPPZC7ynWyjdTA==}
     engines: {node: ^20.19.0 || ^22.13.0 || >=24}
 
-  eslint@10.2.1:
-    resolution: {integrity: sha512-wiyGaKsDgqXvF40P8mDwiUp/KQjE1FdrIEJsM8PZ3XCiniTMXS3OHWWUe5FI5agoCnr8x4xPrTDZuxsBlNHl+Q==}
+  eslint@10.3.0:
+    resolution: {integrity: sha512-XbEXaRva5cF0ZQB8w6MluHA0kZZfV2DuCMJ3ozyEOHLwDpZX2Lmm/7Pp0xdJmI0GL1W05VH5VwIFHEm1Vcw2gw==}
     engines: {node: ^20.19.0 || ^22.13.0 || >=24}
     hasBin: true
     peerDependencies:
@@ -1846,9 +1846,9 @@ snapshots:
   '@esbuild/win32-x64@0.28.0':
     optional: true
 
-  '@eslint-community/eslint-utils@4.9.1(eslint@10.2.1)':
+  '@eslint-community/eslint-utils@4.9.1(eslint@10.3.0)':
     dependencies:
-      eslint: 10.2.1
+      eslint: 10.3.0
       eslint-visitor-keys: 3.4.3
 
   '@eslint-community/regexpp@4.12.2': {}
@@ -1930,16 +1930,16 @@ snapshots:
     dependencies:
       nanoevents: 9.1.0
 
-  '@logux/eslint-config@57.1.0(@typescript-eslint/utils@8.59.1(eslint@10.2.1)(typescript@5.9.3))(eslint@10.2.1)(typescript@5.9.3)':
+  '@logux/eslint-config@57.1.0(@typescript-eslint/utils@8.59.1(eslint@10.3.0)(typescript@5.9.3))(eslint@10.3.0)(typescript@5.9.3)':
     dependencies:
       '@eslint/eslintrc': 3.3.5
-      eslint: 10.2.1
-      eslint-plugin-import-x: 4.16.2(@typescript-eslint/utils@8.59.1(eslint@10.2.1)(typescript@5.9.3))(eslint@10.2.1)
-      eslint-plugin-n: 17.24.0(eslint@10.2.1)(typescript@5.9.3)
-      eslint-plugin-perfectionist: 5.9.0(eslint@10.2.1)(typescript@5.9.3)
+      eslint: 10.3.0
+      eslint-plugin-import-x: 4.16.2(@typescript-eslint/utils@8.59.1(eslint@10.3.0)(typescript@5.9.3))(eslint@10.3.0)
+      eslint-plugin-n: 17.24.0(eslint@10.3.0)(typescript@5.9.3)
+      eslint-plugin-perfectionist: 5.9.0(eslint@10.3.0)(typescript@5.9.3)
       eslint-plugin-prefer-let: 4.2.2
       globals: 17.5.0
-      typescript-eslint: 8.59.1(eslint@10.2.1)(typescript@5.9.3)
+      typescript-eslint: 8.59.1(eslint@10.3.0)(typescript@5.9.3)
     transitivePeerDependencies:
       - '@typescript-eslint/utils'
       - eslint-import-resolver-node
@@ -2171,15 +2171,15 @@ snapshots:
 
   '@types/unist@3.0.3': {}
 
-  '@typescript-eslint/eslint-plugin@8.59.1(@typescript-eslint/parser@8.59.1(eslint@10.2.1)(typescript@5.9.3))(eslint@10.2.1)(typescript@5.9.3)':
+  '@typescript-eslint/eslint-plugin@8.59.1(@typescript-eslint/parser@8.59.1(eslint@10.3.0)(typescript@5.9.3))(eslint@10.3.0)(typescript@5.9.3)':
     dependencies:
       '@eslint-community/regexpp': 4.12.2
-      '@typescript-eslint/parser': 8.59.1(eslint@10.2.1)(typescript@5.9.3)
+      '@typescript-eslint/parser': 8.59.1(eslint@10.3.0)(typescript@5.9.3)
       '@typescript-eslint/scope-manager': 8.59.1
-      '@typescript-eslint/type-utils': 8.59.1(eslint@10.2.1)(typescript@5.9.3)
-      '@typescript-eslint/utils': 8.59.1(eslint@10.2.1)(typescript@5.9.3)
+      '@typescript-eslint/type-utils': 8.59.1(eslint@10.3.0)(typescript@5.9.3)
+      '@typescript-eslint/utils': 8.59.1(eslint@10.3.0)(typescript@5.9.3)
       '@typescript-eslint/visitor-keys': 8.59.1
-      eslint: 10.2.1
+      eslint: 10.3.0
       ignore: 7.0.5
       natural-compare: 1.4.0
       ts-api-utils: 2.5.0(typescript@5.9.3)
@@ -2187,14 +2187,14 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  '@typescript-eslint/parser@8.59.1(eslint@10.2.1)(typescript@5.9.3)':
+  '@typescript-eslint/parser@8.59.1(eslint@10.3.0)(typescript@5.9.3)':
     dependencies:
       '@typescript-eslint/scope-manager': 8.59.1
       '@typescript-eslint/types': 8.59.1
       '@typescript-eslint/typescript-estree': 8.59.1(typescript@5.9.3)
       '@typescript-eslint/visitor-keys': 8.59.1
       debug: 4.4.3
-      eslint: 10.2.1
+      eslint: 10.3.0
       typescript: 5.9.3
     transitivePeerDependencies:
       - supports-color
@@ -2217,13 +2217,13 @@ snapshots:
     dependencies:
       typescript: 5.9.3
 
-  '@typescript-eslint/type-utils@8.59.1(eslint@10.2.1)(typescript@5.9.3)':
+  '@typescript-eslint/type-utils@8.59.1(eslint@10.3.0)(typescript@5.9.3)':
     dependencies:
       '@typescript-eslint/types': 8.59.1
       '@typescript-eslint/typescript-estree': 8.59.1(typescript@5.9.3)
-      '@typescript-eslint/utils': 8.59.1(eslint@10.2.1)(typescript@5.9.3)
+      '@typescript-eslint/utils': 8.59.1(eslint@10.3.0)(typescript@5.9.3)
       debug: 4.4.3
-      eslint: 10.2.1
+      eslint: 10.3.0
       ts-api-utils: 2.5.0(typescript@5.9.3)
       typescript: 5.9.3
     transitivePeerDependencies:
@@ -2246,13 +2246,13 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  '@typescript-eslint/utils@8.59.1(eslint@10.2.1)(typescript@5.9.3)':
+  '@typescript-eslint/utils@8.59.1(eslint@10.3.0)(typescript@5.9.3)':
     dependencies:
-      '@eslint-community/eslint-utils': 4.9.1(eslint@10.2.1)
+      '@eslint-community/eslint-utils': 4.9.1(eslint@10.3.0)
       '@typescript-eslint/scope-manager': 8.59.1
       '@typescript-eslint/types': 8.59.1
       '@typescript-eslint/typescript-estree': 8.59.1(typescript@5.9.3)
-      eslint: 10.2.1
+      eslint: 10.3.0
       typescript: 5.9.3
     transitivePeerDependencies:
       - supports-color
@@ -2406,7 +2406,7 @@ snapshots:
       typescript: 5.9.3
       vfile-location: 5.0.3
 
-  clean-publish@6.0.5:
+  clean-publish@7.0.1:
     dependencies:
       lilconfig: 3.1.3
       picomatch: 4.0.4
@@ -2515,9 +2515,9 @@ snapshots:
 
   escape-string-regexp@4.0.0: {}
 
-  eslint-compat-utils@0.5.1(eslint@10.2.1):
+  eslint-compat-utils@0.5.1(eslint@10.3.0):
     dependencies:
-      eslint: 10.2.1
+      eslint: 10.3.0
       semver: 7.7.4
 
   eslint-import-context@0.1.9(unrs-resolver@1.11.1):
@@ -2527,20 +2527,20 @@ snapshots:
     optionalDependencies:
       unrs-resolver: 1.11.1
 
-  eslint-plugin-es-x@7.8.0(eslint@10.2.1):
+  eslint-plugin-es-x@7.8.0(eslint@10.3.0):
     dependencies:
-      '@eslint-community/eslint-utils': 4.9.1(eslint@10.2.1)
+      '@eslint-community/eslint-utils': 4.9.1(eslint@10.3.0)
       '@eslint-community/regexpp': 4.12.2
-      eslint: 10.2.1
-      eslint-compat-utils: 0.5.1(eslint@10.2.1)
+      eslint: 10.3.0
+      eslint-compat-utils: 0.5.1(eslint@10.3.0)
 
-  eslint-plugin-import-x@4.16.2(@typescript-eslint/utils@8.59.1(eslint@10.2.1)(typescript@5.9.3))(eslint@10.2.1):
+  eslint-plugin-import-x@4.16.2(@typescript-eslint/utils@8.59.1(eslint@10.3.0)(typescript@5.9.3))(eslint@10.3.0):
     dependencies:
       '@package-json/types': 0.0.12
       '@typescript-eslint/types': 8.59.1
       comment-parser: 1.4.6
       debug: 4.4.3
-      eslint: 10.2.1
+      eslint: 10.3.0
       eslint-import-context: 0.1.9(unrs-resolver@1.11.1)
       is-glob: 4.0.3
       minimatch: 10.2.5
@@ -2548,16 +2548,16 @@ snapshots:
       stable-hash-x: 0.2.0
       unrs-resolver: 1.11.1
     optionalDependencies:
-      '@typescript-eslint/utils': 8.59.1(eslint@10.2.1)(typescript@5.9.3)
+      '@typescript-eslint/utils': 8.59.1(eslint@10.3.0)(typescript@5.9.3)
     transitivePeerDependencies:
       - supports-color
 
-  eslint-plugin-n@17.24.0(eslint@10.2.1)(typescript@5.9.3):
+  eslint-plugin-n@17.24.0(eslint@10.3.0)(typescript@5.9.3):
     dependencies:
-      '@eslint-community/eslint-utils': 4.9.1(eslint@10.2.1)
+      '@eslint-community/eslint-utils': 4.9.1(eslint@10.3.0)
       enhanced-resolve: 5.21.0
-      eslint: 10.2.1
-      eslint-plugin-es-x: 7.8.0(eslint@10.2.1)
+      eslint: 10.3.0
+      eslint-plugin-es-x: 7.8.0(eslint@10.3.0)
       get-tsconfig: 4.14.0
       globals: 15.15.0
       globrex: 0.1.2
@@ -2567,10 +2567,10 @@ snapshots:
     transitivePeerDependencies:
       - typescript
 
-  eslint-plugin-perfectionist@5.9.0(eslint@10.2.1)(typescript@5.9.3):
+  eslint-plugin-perfectionist@5.9.0(eslint@10.3.0)(typescript@5.9.3):
     dependencies:
-      '@typescript-eslint/utils': 8.59.1(eslint@10.2.1)(typescript@5.9.3)
-      eslint: 10.2.1
+      '@typescript-eslint/utils': 8.59.1(eslint@10.3.0)(typescript@5.9.3)
+      eslint: 10.3.0
       natural-orderby: 5.0.0
     transitivePeerDependencies:
       - supports-color
@@ -2593,9 +2593,9 @@ snapshots:
 
   eslint-visitor-keys@5.0.1: {}
 
-  eslint@10.2.1:
+  eslint@10.3.0:
     dependencies:
-      '@eslint-community/eslint-utils': 4.9.1(eslint@10.2.1)
+      '@eslint-community/eslint-utils': 4.9.1(eslint@10.3.0)
       '@eslint-community/regexpp': 4.12.2
       '@eslint/config-array': 0.23.5
       '@eslint/config-helpers': 0.5.5
@@ -3085,13 +3085,13 @@ snapshots:
     dependencies:
       prelude-ls: 1.2.1
 
-  typescript-eslint@8.59.1(eslint@10.2.1)(typescript@5.9.3):
+  typescript-eslint@8.59.1(eslint@10.3.0)(typescript@5.9.3):
     dependencies:
-      '@typescript-eslint/eslint-plugin': 8.59.1(@typescript-eslint/parser@8.59.1(eslint@10.2.1)(typescript@5.9.3))(eslint@10.2.1)(typescript@5.9.3)
-      '@typescript-eslint/parser': 8.59.1(eslint@10.2.1)(typescript@5.9.3)
+      '@typescript-eslint/eslint-plugin': 8.59.1(@typescript-eslint/parser@8.59.1(eslint@10.3.0)(typescript@5.9.3))(eslint@10.3.0)(typescript@5.9.3)
+      '@typescript-eslint/parser': 8.59.1(eslint@10.3.0)(typescript@5.9.3)
       '@typescript-eslint/typescript-estree': 8.59.1(typescript@5.9.3)
-      '@typescript-eslint/utils': 8.59.1(eslint@10.2.1)(typescript@5.9.3)
-      eslint: 10.2.1
+      '@typescript-eslint/utils': 8.59.1(eslint@10.3.0)(typescript@5.9.3)
+      eslint: 10.3.0
       typescript: 5.9.3
     transitivePeerDependencies:
       - supports-color
diff --git a/test/stringifier.test.js b/test/stringifier.test.js
index c0afd658a..4414cd46e 100755
--- a/test/stringifier.test.js
+++ b/test/stringifier.test.js
@@ -320,4 +320,39 @@ test('does not escape Document raws', () => {
   is(document.toString(), 'a {}</style>b {}</style>')
 })
 
+test('always calls raw to retrieve raws', () => {
+  class CustomStringifier extends Stringifier {
+    raw(node, own, detect) {
+      return `\nRAW(${node.type}, ${own}, ${detect})\n`
+    }
+  }
+  let root = new Root()
+  let rootRule = new Rule({ selector: 'a' })
+  let decl = new Declaration({ prop: 'color', value: 'black' })
+  decl.raws.before = 'BEFORE'
+  decl.raws.between = 'BETWEEN'
+  decl.raws.after = 'AFTER'
+  root.append(rootRule)
+  rootRule.append(decl)
+
+  let stringify = (node, builder) => {
+    let customStringifier = new CustomStringifier(builder)
+    customStringifier.stringify(node)
+  }
+  let result = root.toString(stringify)
+  is(result, [
+    '',
+    'RAW(rule, before, undefined)',
+    'a',
+    'RAW(rule, between, beforeOpen)',
+    '{',
+    'RAW(decl, before, undefined)',
+    'color',
+    'RAW(decl, between, colon)',
+    'black;',
+    'RAW(rule, after, undefined)',
+    '}'
+  ].join('\n'))
+})
+
 test.run()