--- mutter-3.18.0/src/backends/meta-cursor-renderer.c.orig	2015-09-23 13:54:31.297523343 +0200
+++ mutter-3.18.0/src/backends/meta-cursor-renderer.c	2015-09-23 13:54:43.728271766 +0200
@@ -31,6 +31,7 @@
 
 #include <cogl/cogl.h>
 #include <clutter/clutter.h>
+#include <math.h>
 
 #include "meta-stage.h"