diff --git a/lib/CodeGen/CGObjCGNU.cpp b/lib/CodeGen/CGObjCGNU.cpp
index 54c4e65..68895dd 100644
--- a/lib/CodeGen/CGObjCGNU.cpp
+++ b/lib/CodeGen/CGObjCGNU.cpp
@@ -2654,7 +2654,10 @@
       Offset = new llvm::GlobalVariable(TheModule, IntTy,
           false, llvm::GlobalValue::LinkOnceAnyLinkage,
           llvm::Constant::getNullValue(IntTy), name);
-    return CGF.Builder.CreateLoad(Offset);
+    Offset = CGF.Builder.CreateLoad(Offset);
+    if (Offset->getType() != PtrDiffTy)
+      Offset = CGF.Builder.CreateZExtOrBitCast(Offset, PtrDiffTy);
+    return Offset;
   }
   uint64_t Offset = ComputeIvarBaseOffset(CGF.CGM, Interface, Ivar);
   return llvm::ConstantInt::get(PtrDiffTy, Offset, /*isSigned*/true);