diff --git a/x11-wm/xcompmgr/Makefile b/x11-wm/xcompmgr/Makefile
index ccc97d0f0eda..94df2d0f6ace 100644
--- a/x11-wm/xcompmgr/Makefile
+++ b/x11-wm/xcompmgr/Makefile
@@ -18,4 +18,10 @@ GNU_CONFIGURE=	yes
 
 MAN1=		xcompmgr.1
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+.if ${X_WINDOW_SYSTEM:L} != xorg
+IGNORE=	requires the composite extension, which is unavailable with XFree86.
+.endif
+
+.include <bsd.port.post.mk>