diff --git a/src/client/src/tscGlobalmerge.c b/src/client/src/tscGlobalmerge.c
index bacd938b85..d192f743e1 100644
--- a/src/client/src/tscGlobalmerge.c
+++ b/src/client/src/tscGlobalmerge.c
@@ -1016,7 +1016,7 @@ static void ensureOutputBuf(SSLimitOperatorInfo * pInfo, SSDataBlock *pResultBlo
       }
 
       pInfo->capacity  = total;
-      pInfo->threshold = total * 0.8;
+      pInfo->threshold = (int64_t)(total * 0.8);
     }
   }
 }