diff --git a/src/idempotency/server/server_handler.c b/src/idempotency/server/server_handler.c
index 2519225..a62dcf8 100644
--- a/src/idempotency/server/server_handler.c
+++ b/src/idempotency/server/server_handler.c
@@ -174,7 +174,7 @@ int sf_server_deal_report_req_receipt(struct fast_task_info *task,
 }
 
 IdempotencyRequest *sf_server_update_prepare_and_check(
-        struct fast_task_info *task, struct fast_mblock_man *
+        SFRequestInfo *req, struct fast_mblock_man *
         request_allocator, IdempotencyChannel *channel,
         SFResponseInfo *response, int *result)
 {
@@ -188,8 +188,7 @@ IdempotencyRequest *sf_server_update_prepare_and_check(
         return NULL;
     }
 
-    adheader = (SFProtoIdempotencyAdditionalHeader *)
-        (task->data + sizeof(SFCommonProtoHeader));
+    adheader = (SFProtoIdempotencyAdditionalHeader *)req->body;
     request = (IdempotencyRequest *)fast_mblock_alloc_object(request_allocator);
     if (request == NULL) {
         *result = ENOMEM;
diff --git a/src/idempotency/server/server_handler.h b/src/idempotency/server/server_handler.h
index 73d8251..74bc478 100644
--- a/src/idempotency/server/server_handler.h
+++ b/src/idempotency/server/server_handler.h
@@ -37,7 +37,7 @@ int sf_server_deal_report_req_receipt(struct fast_task_info *task,
         SFResponseInfo *response);
 
 IdempotencyRequest *sf_server_update_prepare_and_check(
-        struct fast_task_info *task, struct fast_mblock_man *
+        SFRequestInfo *req, struct fast_mblock_man *
         request_allocator, IdempotencyChannel *channel,
         SFResponseInfo *response, int *result);
 
diff --git a/src/sf_proto.c b/src/sf_proto.c
index ed634b4..7d7714e 100644
--- a/src/sf_proto.c
+++ b/src/sf_proto.c
@@ -56,7 +56,7 @@ int sf_check_response(ConnectionInfo *conn, SFResponseInfo *response,
                     response->error.message,
                     "response cmd: %d != expect: %d",
                     response->header.cmd, expect_cmd);
-            return ERANGE;
+            return EINVAL;
         }
 
         return 0;