diff --git a/client/src/telethon/_impl/mtsender/sender.py b/client/src/telethon/_impl/mtsender/sender.py
index 35dabfd1..efa93b48 100644
--- a/client/src/telethon/_impl/mtsender/sender.py
+++ b/client/src/telethon/_impl/mtsender/sender.py
@@ -278,6 +278,7 @@ class Sender:
 
     async def _do_send(self) -> None:
         if self._write_drain_pending:
+            self._on_net_write()
             await self._writer.drain()
             self._write_drain_pending = False
         else: