diff --git a/src/util/src/ttokenizer.c b/src/util/src/ttokenizer.c
index 3448e8e2baecbafb5e34febf9c2135424e0cccb6..b02ba96f0720bf730190f2408ecd2466225440be 100644
--- a/src/util/src/ttokenizer.c
+++ b/src/util/src/ttokenizer.c
@@ -275,6 +275,10 @@ static int32_t tKeywordCode(const char* z, int n) {
     }
   }
 
+  if (keywordHashTable == NULL) {
+    return TK_ILLEGAL;
+  }
+  
   SKeyword** pKey = (SKeyword**)taosHashGet(keywordHashTable, key, n);
   return (pKey != NULL)? (*pKey)->type:TK_ID;
 }