diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -202,6 +202,9 @@
 - Fix crash when evaluating consteval constructor of derived class whose base
   has more than one field.
   (`#60166 <https://github.com/llvm/llvm-project/issues/60166>`_)
+- Fix bug in the computation of the ``__has_unique_object_representations``
+  builtin for types with unnamed bitfields.
+  (`#61336 <https://github.com/llvm/llvm-project/issues/61336>`_)
 
 Bug Fixes to AST Handling
 ^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -2810,6 +2810,9 @@
   int64_t FieldSizeInBits =
       Context.toBits(Context.getTypeSizeInChars(Field->getType()));
   if (Field->isBitField()) {
+    if (Field->isUnnamedBitfield())
+      return std::nullopt;
+
     int64_t BitfieldSize = Field->getBitWidthValue(Context);
     if (IsBitIntType) {
       if ((unsigned)BitfieldSize >
diff --git a/clang/test/SemaCXX/type-traits.cpp b/clang/test/SemaCXX/type-traits.cpp
--- a/clang/test/SemaCXX/type-traits.cpp
+++ b/clang/test/SemaCXX/type-traits.cpp
@@ -2878,9 +2878,15 @@
   char d : 2;
 };
 
+struct UnnamedBitfield {
+  int named : 8;
+  int : 24;
+};
+
 static_assert(!has_unique_object_representations<PaddedBitfield>::value, "Bitfield padding");
 static_assert(has_unique_object_representations<UnPaddedBitfield>::value, "Bitfield padding");
 static_assert(!has_unique_object_representations<AlignedPaddedBitfield>::value, "Bitfield padding");
+static_assert(!has_unique_object_representations<UnnamedBitfield>::value, "Bitfield padding");
 
 struct BoolBitfield {
   bool b : 8;