diff --git a/src/query/src/qAggMain.c b/src/query/src/qAggMain.c
index 370e9e2b7908c2df6a1a2c24f559d5d360b0f023..c598679a91fad12a0ed93f8ba0adc8d14bbc8792 100644
--- a/src/query/src/qAggMain.c
+++ b/src/query/src/qAggMain.c
@@ -4701,7 +4701,7 @@ static void irate_function_f(SQLFunctionCtx *pCtx, int32_t index) {
   SRateInfo *pRateInfo  = (SRateInfo *)GET_ROWCELL_INTERBUF(pResInfo);
   TSKEY     *primaryKey = GET_TS_LIST(pCtx);
   
-  int64_t v = 0;
+  double v = 0;
   GET_TYPED_DATA(v, double, pCtx->inputType, pData);
 
   pRateInfo->firstKey   = pRateInfo->lastKey;