diff --git a/src/vnode/main/src/vnodeMain.c b/src/vnode/main/src/vnodeMain.c
index f5a780214b33baac82cce52fced47685c8f9014b..7c92ad4f4fdca9ed1598e5c18aa2e96244053d36 100644
--- a/src/vnode/main/src/vnodeMain.c
+++ b/src/vnode/main/src/vnodeMain.c
@@ -344,7 +344,7 @@ static int32_t vnodeSaveCfg(SMDCreateVnodeMsg *pVnodeCfg) {
 
 // TODO: this is a simple implement
 static int32_t vnodeReadCfg(SVnodeObj *pVnode) {
-  char option[3][16] = {0};
+  char option[4][16] = {0};
   char cfgFile[TSDB_FILENAME_LEN * 2] = {0};
   sprintf(cfgFile, "%s/vnode%d/config", tsVnodeDir, pVnode->vgId);