diff --git a/src/query/src/qfill.c b/src/query/src/qfill.c
index 84b2b2c5cf..7b3ea5c1f0 100644
--- a/src/query/src/qfill.c
+++ b/src/query/src/qfill.c
@@ -116,6 +116,8 @@ void taosDestoryFillInfo(SFillInfo* pFillInfo) {
   }
   
   tfree(pFillInfo->pData);
+  tfree(pFillInfo->pFillCol);
+  
   tfree(pFillInfo);
 }