diff --git a/clang/lib/Sema/SemaType.cpp b/clang/lib/Sema/SemaType.cpp
--- a/clang/lib/Sema/SemaType.cpp
+++ b/clang/lib/Sema/SemaType.cpp
@@ -1759,7 +1759,7 @@
     //   The effect of a cv-qualifier-seq in a function declarator is not the
     //   same as adding cv-qualification on top of the function type. In the
     //   latter case, the cv-qualifiers are ignored.
-    if (TypeQuals && Result->isFunctionType()) {
+    if (Result->isFunctionType()) {
       diagnoseAndRemoveTypeQualifiers(
           S, DS, TypeQuals, Result, DeclSpec::TQ_const | DeclSpec::TQ_volatile,
           S.getLangOpts().CPlusPlus