diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index 3f6f13a572dd309b6348241f9533eb3a88594f12..a7e93246b765199369eda8e7aba0da94a49fce3b 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -1646,8 +1646,8 @@ bool leastSQRFunctionSetup(SqlFunctionCtx* pCtx, SResultRowEntryInfo* pResultInf
 
   pInfo->startVal = IS_FLOAT_TYPE(pCtx->param[1].param.nType) ? pCtx->param[1].param.d :
                                                                 (double)pCtx->param[1].param.i;
-  pInfo->stepVal = IS_FLOAT_TYPE(pCtx->param[1].param.nType) ? pCtx->param[2].param.d :
-                                                                (double)pCtx->param[1].param.i;
+  pInfo->stepVal = IS_FLOAT_TYPE(pCtx->param[2].param.nType) ? pCtx->param[2].param.d :
+                                                                (double)pCtx->param[2].param.i;
   return true;
 }