diff --git a/hotkeywrapper.cc b/hotkeywrapper.cc
index 5b16653a..28170d11 100644
--- a/hotkeywrapper.cc
+++ b/hotkeywrapper.cc
@@ -17,8 +17,10 @@
 //////////////////////////////////////////////////////////////////////////
 
 QHotkeyApplication::QHotkeyApplication( int & argc, char ** argv ):
-  QtSingleApplication( argc, argv ),
-  mainWindow( 0 )
+  QtSingleApplication( argc, argv )
+#ifdef Q_OS_WIN32
+,  mainWindow( 0 )
+#endif
 {
 }