diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 3fd0aa79a647788e58c4b92cc5af1c7938a5f1b1..a040b3ef55c7701747bdc564738f36fb0a4fe7b0 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -1999,7 +1999,8 @@ int tscProcessUseDbRsp(SSqlObj *pSql) {
   return 0;
 }
 
-int tscProcessDropDbRsp(SSqlObj *UNUSED_PARAM(pSql)) {
+int tscProcessDropDbRsp(SSqlObj *pSql) {
+  pSql->pTscObj->db[0] = 0;
   taosCacheEmpty(tscCacheHandle);
   return 0;
 }