diff --git a/pypager/key_bindings.py b/pypager/key_bindings.py
index 97c4c64..f117c8d 100644
--- a/pypager/key_bindings.py
+++ b/pypager/key_bindings.py
@@ -303,7 +303,7 @@ def _suspend(event: E) -> None:
         " Suspend to bakground. "
         event.app.suspend_to_background()
 
-    @handle("w")
+    @handle("w", filter=default_focus)
     def _suspend(event: E) -> None:
         " Enable/disable line wrapping. "
         source_info = pager.current_source_info