diff --git a/pyrogram/session/session.py b/pyrogram/session/session.py
index 173e8846..1cd27c5e 100644
--- a/pyrogram/session/session.py
+++ b/pyrogram/session/session.py
@@ -324,7 +324,7 @@ class Session:
                 break
 
             try:
-                self._send(functions.PingDelayDisconnect(
+                await self._send(functions.PingDelayDisconnect(
                     0, self.WAIT_TIMEOUT + 10
                 ), False)
             except (OSError, TimeoutError, Error):