diff -up xf86-video-modesetting-0.8.0/src/compat-api.h.jx xf86-video-modesetting-0.8.0/src/compat-api.h
--- xf86-video-modesetting-0.8.0/src/compat-api.h.jx	2013-03-25 09:14:01.000000000 -0400
+++ xf86-video-modesetting-0.8.0/src/compat-api.h	2013-10-24 15:25:26.471488403 -0400
@@ -91,4 +91,8 @@
 
 #endif
 
+#if XORG_VERSION_CURRENT >= XORG_VERSION_NUMERIC(1,14,99,3,0)
+#define DamageUnregister(a, b) DamageUnregister(b)
+#endif
+
 #endif