diff --git a/src/sf_define.h b/src/sf_define.h
index 682c6f2..6028ec2 100644
--- a/src/sf_define.h
+++ b/src/sf_define.h
@@ -40,6 +40,7 @@
 
 #define SF_NIO_TASK_STAGE_FETCH(task)  task->nio_stages.current
 
+#define SF_CLUSTER_ERROR_LEADER_VERSION_INCONSISTENT 9997
 #define SF_CLUSTER_ERROR_BINLOG_INCONSISTENT 9998
 #define SF_CLUSTER_ERROR_LEADER_INCONSISTENT 9999
 #define SF_CLUSTER_ERROR_MASTER_INCONSISTENT SF_CLUSTER_ERROR_LEADER_INCONSISTENT