diff --git a/lib/CodeGen/CGObjCMac.cpp b/lib/CodeGen/CGObjCMac.cpp
index acb3ece..72953ce 100644
--- a/lib/CodeGen/CGObjCMac.cpp
+++ b/lib/CodeGen/CGObjCMac.cpp
@@ -6167,6 +6167,8 @@
                                            const ObjCAtThrowStmt &S) {
   if (const Expr *ThrowExpr = S.getThrowExpr()) {
     llvm::Value *Exception = CGF.EmitScalarExpr(ThrowExpr);
+    Exception = CGF.Builder.CreateBitCast(Exception, ObjCTypes.ObjectPtrTy,
+                                          "tmp");
     llvm::Value *Args[] = { Exception };
     CGF.EmitCallOrInvoke(ObjCTypes.getExceptionThrowFn(),
                          Args, Args+1)