diff --git a/client/src/audio/notification_sound_engine.h b/client/src/audio/notification_sound_engine.h
index 3d37d58b..07ed3d5c 100644
--- a/client/src/audio/notification_sound_engine.h
+++ b/client/src/audio/notification_sound_engine.h
@@ -8,6 +8,7 @@
 #include <QAudioDevice>
 #include <QList>
 #include <QString>
+#include <QVariant>
 
 namespace xpilot {