diff --git a/internal/test/issues/issue-head-digit-of-httpheader/config.yaml b/internal/test/issues/issue-head-digit-of-httpheader/config.yaml
new file mode 100644
index 0000000000..f3709acd71
--- /dev/null
+++ b/internal/test/issues/issue-head-digit-of-httpheader/config.yaml
@@ -0,0 +1,7 @@
+---
+package: head_digit_of_httpheader
+generate:
+  strict-server: true
+output: issue.gen.go
+output-options:
+  skip-prune: true
diff --git a/internal/test/issues/issue-head-digit-of-httpheader/doc.go b/internal/test/issues/issue-head-digit-of-httpheader/doc.go
new file mode 100644
index 0000000000..4a2cdf80d6
--- /dev/null
+++ b/internal/test/issues/issue-head-digit-of-httpheader/doc.go
@@ -0,0 +1,3 @@
+package head_digit_of_httpheader
+
+//go:generate go run github.com/deepmap/oapi-codegen/cmd/oapi-codegen --config=config.yaml spec.yaml
diff --git a/internal/test/issues/issue-head-digit-of-httpheader/issue.gen.go b/internal/test/issues/issue-head-digit-of-httpheader/issue.gen.go
new file mode 100644
index 0000000000..0ac470b431
--- /dev/null
+++ b/internal/test/issues/issue-head-digit-of-httpheader/issue.gen.go
@@ -0,0 +1,27 @@
+// Package head_digit_of_httpheader provides primitives to interact with the openapi HTTP API.
+//
+// Code generated by github.com/deepmap/oapi-codegen version (devel) DO NOT EDIT.
+package head_digit_of_httpheader
+
+import (
+	"context"
+)
+
+type N200ResponseHeaders struct {
+	N000Foo string
+}
+type N200Response struct {
+	Headers N200ResponseHeaders
+}
+
+type GetFooRequestObject struct {
+}
+
+type GetFoo200Response = N200Response
+
+// StrictServerInterface represents all server handlers.
+type StrictServerInterface interface {
+
+	// (GET /foo)
+	GetFoo(ctx context.Context, request GetFooRequestObject) interface{}
+}
diff --git a/internal/test/issues/issue-head-digit-of-httpheader/spec.yaml b/internal/test/issues/issue-head-digit-of-httpheader/spec.yaml
new file mode 100644
index 0000000000..b6a960ac0c
--- /dev/null
+++ b/internal/test/issues/issue-head-digit-of-httpheader/spec.yaml
@@ -0,0 +1,16 @@
+openapi: 3.0.2
+info:
+  version: "0.0.1"
+paths:
+  /foo:
+    get:
+      responses:
+        200:
+          $ref: "#/components/responses/200"
+components:
+  responses:
+    "200":
+      headers:
+        "000-foo":
+          schema:
+            type: string
diff --git a/pkg/codegen/operations.go b/pkg/codegen/operations.go
index f881b1426f..3aa64ac3fb 100644
--- a/pkg/codegen/operations.go
+++ b/pkg/codegen/operations.go
@@ -751,7 +751,7 @@ func GenerateResponseDefinitions(operationID string, responses openapi3.Response
 			if err != nil {
 				return nil, fmt.Errorf("error generating response header definition: %w", err)
 			}
-			headerDefinition := ResponseHeaderDefinition{Name: headerName, GoName: ToCamelCase(headerName), Schema: contentSchema}
+			headerDefinition := ResponseHeaderDefinition{Name: headerName, GoName: SchemaNameToTypeName(headerName), Schema: contentSchema}
 			responseHeaderDefinitions = append(responseHeaderDefinitions, headerDefinition)
 		}