diff --git a/Lib/ctypes/util.py b/Lib/ctypes/util.py
index 3b21658433b2ed..29a9eaa14d9a4c 100644
--- a/Lib/ctypes/util.py
+++ b/Lib/ctypes/util.py
@@ -421,8 +421,7 @@ def _findLib_ld(name):
             result = None
             try:
                 p = subprocess.Popen(cmd, stdout=subprocess.PIPE,
-                                     stderr=subprocess.PIPE,
-                                     universal_newlines=True)
+                                     stderr=subprocess.PIPE)
                 out, _ = p.communicate()
                 res = re.findall(expr, os.fsdecode(out))
                 for file in res:
diff --git a/Misc/NEWS.d/next/Library/2026-07-23-19-45-00.gh-issue-154551.Ct7pL9.rst b/Misc/NEWS.d/next/Library/2026-07-23-19-45-00.gh-issue-154551.Ct7pL9.rst
new file mode 100644
index 00000000000000..c4db19d89364e0
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-07-23-19-45-00.gh-issue-154551.Ct7pL9.rst
@@ -0,0 +1 @@
+Fix :func:`ctypes.util.find_library` returning ``None`` in non-UTF-8 locales.