diff --git a/qutebrowser/app.py b/qutebrowser/app.py
index 3da540a6d..64a116fc2 100644
--- a/qutebrowser/app.py
+++ b/qutebrowser/app.py
@@ -420,6 +420,8 @@ def _init_modules(args, crash_handler):
     log.init.debug("Misc initialization...")
     if config.get('ui', 'hide-wayland-decoration'):
         os.environ['QT_WAYLAND_DISABLE_WINDOWDECORATION'] = '1'
+    else:
+        os.environ.pop('QT_WAYLAND_DISABLE_WINDOWDECORATION', None)
     _maybe_hide_mouse_cursor()
     objreg.get('config').changed.connect(_maybe_hide_mouse_cursor)