diff --git a/include/util/tdef.h b/include/util/tdef.h
index 8371ee24bb..e2d1beb5a5 100644
--- a/include/util/tdef.h
+++ b/include/util/tdef.h
@@ -187,6 +187,8 @@ typedef enum ELogicConditionType {
   LOGIC_COND_TYPE_NOT,
 } ELogicConditionType;
 
+#define TSDB_INT32_ID_LEN 11
+
 #define TSDB_NAME_DELIMITER_LEN 1
 
 #define TSDB_UNI_LEN  24
diff --git a/source/dnode/mnode/impl/src/mndCompact.c b/source/dnode/mnode/impl/src/mndCompact.c
index 83254b0f73..2de968f90a 100644
--- a/source/dnode/mnode/impl/src/mndCompact.c
+++ b/source/dnode/mnode/impl/src/mndCompact.c
@@ -454,7 +454,7 @@ int32_t mndProcessKillCompactReq(SRpcMsg *pReq){
 
   code = TSDB_CODE_ACTION_IN_PROGRESS;
 
-  char obj[MND_COMPACT_ID_LEN] = {0};
+  char obj[TSDB_INT32_ID_LEN] = {0};
   sprintf(obj, "%d", pCompact->compactId);
 
   auditRecord(pReq, pMnode->clusterId, "killCompact", pCompact->dbname, obj, killCompactReq.sql, killCompactReq.sqlLen);