diff --git a/src/networking.c b/src/networking.c
index 60f1b798..0ca43378 100644
--- a/src/networking.c
+++ b/src/networking.c
@@ -1751,7 +1751,7 @@ void flushSlavesOutputBuffers(void) {
         events = aeGetFileEvents(server.el,slave->fd);
         if (events & AE_WRITABLE &&
             slave->replstate == SLAVE_STATE_ONLINE &&
-            listLength(slave->reply))
+            clientHasPendingReplies(slave))
         {
             writeToClient(slave->fd,slave,0);
         }