diff --git a/src/client/src/tscFunctionImpl.c b/src/client/src/tscFunctionImpl.c
index 2aa45b51285a0e37b7c5da82d09c688b39979560..b0deb9a0487bfa08b3a9669c5d372b1d0533ae26 100644
--- a/src/client/src/tscFunctionImpl.c
+++ b/src/client/src/tscFunctionImpl.c
@@ -3293,7 +3293,7 @@ static void arithmetic_function(SQLFunctionCtx *pCtx) {
 
 static void arithmetic_function_f(SQLFunctionCtx *pCtx, int32_t index) {
   INC_INIT_VAL(pCtx, 1);
-  SArithmeticSupport *sas = (SArithmeticSupport *)pCtx->param[0].pz;
+  SArithmeticSupport *sas = (SArithmeticSupport *)pCtx->param[1].pz;
 
   sas->offset = index;
   tSQLBinaryExprCalcTraverse(sas->pExpr->pBinExprInfo.pBinExpr, 1, pCtx->aOutputBuf, sas, pCtx->order,