diff --git a/Gui/mplayer/play.c b/Gui/mplayer/play.c
index c784e7d58e..fec350203d 100644
--- a/Gui/mplayer/play.c
+++ b/Gui/mplayer/play.c
@@ -13,6 +13,7 @@
 #include "../../help_mp.h"
 #include "../../mplayer.h"
 #include "../../libvo/x11_common.h"
+#include "../../libvo/video_out.h"
 #include "../../input/input.h"
 
 #include "../app.h"
diff --git a/Gui/wm/ws.c b/Gui/wm/ws.c
index 3af1af3ddb..b216307a53 100644
--- a/Gui/wm/ws.c
+++ b/Gui/wm/ws.c
@@ -20,6 +20,7 @@
 
 #include "../../config.h"
 #include "../../libvo/x11_common.h"
+#include "../../libvo/video_out.h"
 #include "ws.h"
 #include "wsxdnd.h"
 #include "../../cpudetect.h"