diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index 0c905d4..029a9f7 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -1345,7 +1345,7 @@
     }
     virtual const char *getVAListDeclaration() const {
       // FIXME: implement
-      return "";
+      return "typedef char* __builtin_va_list;";
    }
   };