diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index a0187186ff84883c7a7a2840582d6de84859b8bf..a270976934f3d9c2c8856a957ad8f8de2d2d7ec7 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -161,7 +161,7 @@ StringRef CGDebugInfo::getObjCMethodName(const ObjCMethodDecl *OMD) {
              dyn_cast<const ObjCCategoryImplDecl>(DC)){
       OS << ((const NamedDecl *)OCD)->getIdentifier()->getNameStart() << '(' <<
           OCD->getIdentifier()->getNameStart() << ')';
-  } else if (isa<const ObjCProtocolDecl>(DC)) {
+  } else if (isa<ObjCProtocolDecl>(DC)) {
     // We can extract the type of the class from the self pointer.
     if (ImplicitParamDecl* SelfDecl = OMD->getSelfDecl()) {
       QualType ClassTy =