--- src/gui/qxtglobalshortcut_x11.cpp.orig	2013-12-17 15:03:25.388283632 +0400
+++ src/gui/qxtglobalshortcut_x11.cpp	2013-12-17 15:04:31.566286818 +0400
@@ -59,7 +59,11 @@
             // Mod1Mask == Alt, Mod4Mask == Meta
             key->state & (ShiftMask | ControlMask | Mod1Mask | Mod4Mask));
     }
+#if QT_VERSION < QT_VERSION_CHECK(5,0,0)
+    return prevEventFilter ? prevEventFilter(message) : false;
+#else
     return false;
+#endif
 }
 
 quint32 QxtGlobalShortcutPrivate::nativeModifiers(Qt::KeyboardModifiers modifiers)