diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index c8f0b3d8263a1809d0e7578757949607342127db..72093793a1b4baba3f62d6144e3031aecd1ce8ac 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -5451,6 +5451,8 @@ int32_t modeFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
     colDataAppendNULL(pCol, currentRow);
   }
 
+  taosHashCleanup(pInfo->pHash);
+
   return pResInfo->numOfRes;
 }