diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index 82f950020fb74816c341927545e2cdd2c7775fd9..88644107d4139af3f227b217a009b4371dee1b60 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -4832,7 +4832,7 @@ int32_t tscCreateQueryFromQueryInfo(SQueryInfo* pQueryInfo, SQueryAttr* pQueryAt
   }
 
   if (pQueryAttr->fillType != TSDB_FILL_NONE) {
-    pQueryAttr->fillVal = calloc(pQueryAttr->numOfOutput, sizeof(int64_t));
+    pQueryAttr->fillVal = calloc(pQueryInfo->numOfFillVal, sizeof(int64_t));
     memcpy(pQueryAttr->fillVal, pQueryInfo->fillVal, pQueryInfo->numOfFillVal * sizeof(int64_t));
   }