diff --git a/qutebrowser/browser/commands.py b/qutebrowser/browser/commands.py
index b685c2c64..2760f18b6 100644
--- a/qutebrowser/browser/commands.py
+++ b/qutebrowser/browser/commands.py
@@ -2234,13 +2234,11 @@ class CommandDispatcher:
             return
 
         window = self._tabbed_browser.widget.window()
-        if window.isFullScreen():
-            window.setWindowState(
-                window.state_before_fullscreen & ~Qt.WindowFullScreen)
-        else:
+
+        if not window.isFullScreen():
             window.state_before_fullscreen = window.windowState()
-            window.setWindowState(
-                window.state_before_fullscreen | Qt.WindowFullScreen)
+        window.setWindowState(window.windowState() ^ Qt.WindowFullScreen)
+
         log.misc.debug('state before fullscreen: {}'.format(
             debug.qflags_key(Qt, window.state_before_fullscreen)))