diff --git a/lib/CodeGen/CGObjCMac.cpp b/lib/CodeGen/CGObjCMac.cpp
index 7c679b9..f5befce 100644
--- a/lib/CodeGen/CGObjCMac.cpp
+++ b/lib/CodeGen/CGObjCMac.cpp
@@ -1639,6 +1639,7 @@
 
   llvm::Constant *Fn = NULL;
   if (CGM.ReturnTypeUsesSRet(FnInfo)) {
+    CGF.EmitNullInitialization(Return.getValue(), ResultType);
     Fn = (ObjCABI == 2) ?  ObjCTypes.getSendStretFn2(IsSuper)
       : ObjCTypes.getSendStretFn(IsSuper);
   } else if (CGM.ReturnTypeUsesFPRet(ResultType)) {
@@ -5629,6 +5630,7 @@
   llvm::Constant *Fn = 0;
   std::string Name("\01l_");
   if (CGM.ReturnTypeUsesSRet(FnInfo)) {
+    CGF.EmitNullInitialization(Return.getValue(), ResultType);
     if (IsSuper) {
       Fn = ObjCTypes.getMessageSendSuper2StretFixupFn();
       Name += "objc_msgSendSuper2_stret_fixup";