diff --git a/src/stage1/codegen.cpp b/src/stage1/codegen.cpp
index 2341ad4483d58d79fc417bb7857a4f8320d52c07..bd572bb96c60a2528cf0123aac75e8152df4793d 100644
--- a/src/stage1/codegen.cpp
+++ b/src/stage1/codegen.cpp
@@ -223,7 +223,7 @@ static ZigLLVM_CallingConv get_llvm_cc(CodeGen *g, CallingConvention cc) {
 
 static void add_uwtable_attr(CodeGen *g, LLVMValueRef fn_val) {
     if (g->unwind_tables) {
-        addLLVMFnAttrStr(fn_val, "uwtable", "sync");
+        addLLVMFnAttrInt(fn_val, "uwtable", 2);
     }
 }