diff --git a/lib/CodeGen/TargetInfo.cpp b/lib/CodeGen/TargetInfo.cpp
index 497adcd..dca335d 100644
--- a/lib/CodeGen/TargetInfo.cpp
+++ b/lib/CodeGen/TargetInfo.cpp
@@ -970,7 +970,8 @@
       // Now add the 'alignstack' attribute with a value of 16.
       llvm::Attributes::Builder B;
       B.addStackAlignmentAttr(16);
-      Fn->addAttribute(~0U, llvm::Attributes::get(CGM.getLLVMContext(), B));
+      Fn->addAttribute(llvm::AttrListPtr::FunctionIndex,
+                       llvm::Attributes::get(CGM.getLLVMContext(), B));
     }
   }
 }