diff --git a/lib/AST/Decl.cpp b/lib/AST/Decl.cpp
index ffe4967..e19a9fb 100644
--- a/lib/AST/Decl.cpp
+++ b/lib/AST/Decl.cpp
@@ -1509,6 +1509,7 @@
                                 TypeForDecl->getAs<InjectedClassNameType>())) {
     assert(Injected->Decl == this &&
            "Attempt to redefine a class template definition?");
+    (void)Injected;
   }
 }