diff --git a/src/osd.cpp b/src/osd.cpp
index 9f6cdf596..d11fa50e3 100644
--- a/src/osd.cpp
+++ b/src/osd.cpp
@@ -116,3 +116,7 @@ void OSD::ShowMessage(const QString& summary,
       break;
   }
 }
+
+#ifndef Q_WS_X11
+void OSD::CallFinished(QDBusPendingCallWatcher*) {}
+#endif
diff --git a/src/osd.h b/src/osd.h
index 8794fbf1e..554a01219 100644
--- a/src/osd.h
+++ b/src/osd.h
@@ -26,6 +26,8 @@
 
 class OSDPretty;
 
+class QDBusPendingCallWatcher;
+
 #ifdef Q_WS_X11
 #include <QDBusArgument>
 #include <boost/scoped_ptr.hpp>
@@ -95,9 +97,9 @@ class OSD : public QObject {
 
 #ifdef Q_WS_X11
   boost::scoped_ptr<org::freedesktop::Notifications> interface_;
+#endif
  private slots:
   void CallFinished(QDBusPendingCallWatcher* watcher);
-#endif
 };
 
 #endif // OSD_H