diff --git a/src/pyj/read_book/selection_bar.pyj b/src/pyj/read_book/selection_bar.pyj
index 4277eb9a17..2f19f76d14 100644
--- a/src/pyj/read_book/selection_bar.pyj
+++ b/src/pyj/read_book/selection_bar.pyj
@@ -562,6 +562,8 @@ class SelectionBar:
             self.copy_to_clipboard()
             return
         sc_name = shortcut_for_key_event(ev, self.view.keyboard_shortcut_map)
+        if not sc_name:
+            return
         if sc_name is 'show_chrome':
             self.clear_selection()
         elif sc_name is 'copy_to_clipboard':