diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp
index f641a72ed26448..a1a51d38b93e1f 100644
--- a/clang/lib/AST/Decl.cpp
+++ b/clang/lib/AST/Decl.cpp
@@ -4003,7 +4003,7 @@ const IdentifierInfo *FunctionDecl::getLiteralIdentifier() const {
 FunctionDecl::TemplatedKind FunctionDecl::getTemplatedKind() const {
   if (TemplateOrSpecialization.isNull())
     return TK_NonTemplate;
-  if (const auto *ND = TemplateOrSpecialization.dyn_cast<NamedDecl *>()) {
+  if (const auto *ND = dyn_cast<NamedDecl *>(TemplateOrSpecialization)) {
     if (isa<FunctionDecl>(ND))
       return TK_DependentNonTemplate;
     assert(isa<FunctionTemplateDecl>(ND) &&