diff --git a/clang/lib/AST/ItaniumMangle.cpp b/clang/lib/AST/ItaniumMangle.cpp
index 4afe0ac062f9..2cf69d34d472 100644
--- a/clang/lib/AST/ItaniumMangle.cpp
+++ b/clang/lib/AST/ItaniumMangle.cpp
@@ -5085,8 +5085,7 @@ void CXXNameMangler::mangleValueInTemplateArg(QualType T, const APValue &V) {
   }
 
   case APValue::Union: {
-    const CXXRecordDecl *RD = T->getAsCXXRecordDecl();
-    assert(RD && "unexpected type for union value");
+    assert(T->getAsCXXRecordDecl() && "unexpected type for union value");
     const FieldDecl *FD = V.getUnionField();
 
     if (!FD) {