diff --git a/clang/lib/AST/RecordLayoutBuilder.cpp b/clang/lib/AST/RecordLayoutBuilder.cpp
--- a/clang/lib/AST/RecordLayoutBuilder.cpp
+++ b/clang/lib/AST/RecordLayoutBuilder.cpp
@@ -1891,6 +1891,7 @@
 
   llvm::Triple Target = Context.getTargetInfo().getTriple();
   bool FieldPacked = (Packed && (!FieldClass || FieldClass->isPOD() ||
+                                 FieldClass->hasAttr<PackedAttr>() ||
                                  Context.getLangOpts().getClangABICompat() <=
                                      LangOptions::ClangABI::Ver14 ||
                                  Target.isPS() || Target.isOSDarwin())) ||
diff --git a/clang/test/SemaCXX/class-layout.cpp b/clang/test/SemaCXX/class-layout.cpp
--- a/clang/test/SemaCXX/class-layout.cpp
+++ b/clang/test/SemaCXX/class-layout.cpp
@@ -642,3 +642,17 @@
 _Static_assert(_Alignof(t1) == 1, "");
 _Static_assert(_Alignof(t2) == 1, "");
 } // namespace non_pod_packed
+
+namespace non_pod_packed_packed {
+struct B {
+  int b;
+};
+struct  FromB : B {
+} __attribute__((packed));
+struct C {
+  char a[3];
+  FromB b;
+} __attribute__((packed));
+_Static_assert(__builtin_offsetof(C, b) == 3, "");
+}
+