diff --git a/clang/unittests/AST/DeclTest.cpp b/clang/unittests/AST/DeclTest.cpp
index afaf413493299..6b443918ec137 100644
--- a/clang/unittests/AST/DeclTest.cpp
+++ b/clang/unittests/AST/DeclTest.cpp
@@ -90,7 +90,7 @@ TEST(Decl, AsmLabelAttr) {
   DeclF->addAttr(AsmLabelAttr::Create(Ctx, "foo"));
 
   // Mangle the decl names.
-  std::string MangleF, MangleG;
+  std::string MangleF;
   std::unique_ptr<ItaniumMangleContext> MC(
       ItaniumMangleContext::create(Ctx, Diags));
   {