diff --git a/asyncssh/editor.py b/asyncssh/editor.py
index d2c9ff9..174cae2 100644
--- a/asyncssh/editor.py
+++ b/asyncssh/editor.py
@@ -704,8 +704,10 @@ def process_input(self, data: str, datatype: DataType) -> None:
                     self._ring_bell()
 
             self._bell_rung = False
-            self._chan.write(''.join(self._outbuf))
-            self._outbuf.clear()
+
+            if self._outbuf:
+                self._chan.write(''.join(self._outbuf))
+                self._outbuf.clear()
         else:
             self._session.data_received(data, datatype)