diff --git a/matrix/server.py b/matrix/server.py
index f2e7130..099fe98 100644
--- a/matrix/server.py
+++ b/matrix/server.py
@@ -381,7 +381,7 @@ def send_cb(server_name, file_descriptor):
         server.send_fd_hook = None
 
     if server.send_buffer:
-        try_send(server, send_buffer)
+        try_send(server, server.send_buffer)
 
     return W.WEECHAT_RC_OK