diff --git a/lib/platform/CMSWindowsScreen.h b/lib/platform/CMSWindowsScreen.h
index 5f10a45d..cd7727bf 100644
--- a/lib/platform/CMSWindowsScreen.h
+++ b/lib/platform/CMSWindowsScreen.h
@@ -27,6 +27,7 @@
 class CEventQueueTimer;
 class CMSWindowsScreenSaver;
 class CThread;
+class IJob;
 
 //! Implementation of IPlatformScreen for Microsoft Windows
 class CMSWindowsScreen : public IPlatformScreen {