diff --git a/protocol-extensions.asciidoc b/protocol-extensions.asciidoc
index 13e133909..3bf53d467 100644
--- a/protocol-extensions.asciidoc
+++ b/protocol-extensions.asciidoc
@@ -111,7 +111,7 @@ The new mode works as follows:
     not reset, the user can still issue a `reset` command in the shell to restore
     normal key handling. Note that this includes pressing the `Shift` modifier
     and printable keys. Note that this means there are no repeat and release
-    events for these keys.
+    events for these keys and also for the left and right shift keys.
 
   * For non printable keys and key combinations including one or more modifiers,
     an escape sequence encoding the key event is sent. For details on the