diff --git a/clang/lib/AST/QualTypeNames.cpp b/clang/lib/AST/QualTypeNames.cpp
index 066377423df76..18ac4b1eb57e7 100644
--- a/clang/lib/AST/QualTypeNames.cpp
+++ b/clang/lib/AST/QualTypeNames.cpp
@@ -65,8 +65,9 @@ static bool getFullyQualifiedTemplateName(const ASTContext &Ctx,
   assert(ArgTDecl != nullptr);
   QualifiedTemplateName *QTName = TName.getAsQualifiedTemplateName();
 
-  if (QTName && !QTName->hasTemplateKeyword()) {
-    NNS = QTName->getQualifier();
+  if (QTName &&
+      !QTName->hasTemplateKeyword() &&
+      (NNS = QTName->getQualifier())) {
     NestedNameSpecifier *QNNS = getFullyQualifiedNestedNameSpecifier(
         Ctx, NNS, WithGlobalNsPrefix);
     if (QNNS != NNS) {