diff --git a/src/codegen.cpp b/src/codegen.cpp
index 298e89579f4fc79f3f5d29043f0d23648706fb39..a15ecbaf6e202adb5780d1b170c05e0a644097c3 100644
--- a/src/codegen.cpp
+++ b/src/codegen.cpp
@@ -3106,7 +3106,7 @@ static void gen_set_stack_pointer(CodeGen *g, LLVMValueRef aligned_end_addr) {
 
 static void set_call_instr_sret(CodeGen *g, LLVMValueRef call_instr) {
     unsigned attr_kind_id = LLVMGetEnumAttributeKindForName("sret", 4);
-    LLVMAttributeRef sret_attr = LLVMCreateEnumAttribute(LLVMGetGlobalContext(), attr_kind_id, 1);
+    LLVMAttributeRef sret_attr = LLVMCreateEnumAttribute(LLVMGetGlobalContext(), attr_kind_id, 0);
     LLVMAddCallSiteAttribute(call_instr, 1, sret_attr);
 }