diff --git a/lib/CodeGen/Mangle.cpp b/lib/CodeGen/Mangle.cpp
index c0366bf..2b6e581 100644
--- a/lib/CodeGen/Mangle.cpp
+++ b/lib/CodeGen/Mangle.cpp
@@ -896,7 +896,7 @@
   assert (CD && "Missing container decl in GetNameForMethod");
   OS << (MD->isInstanceMethod() ? '-' : '+') << '[' << CD->getName();
   if (const ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(CD))
-    OS << '(' << CID->getNameAsString() << ')';
+    OS << '(' << CID << ')';
   OS << ' ' << MD->getSelector().getAsString() << ']';
 
   Out << OS.str().size() << OS.str();