Index: osggit/OpenSceneGraph/src/osgPlugins/ffmpeg/FFmpegHeaders.hpp
===================================================================
--- osggit.orig/OpenSceneGraph/src/osgPlugins/ffmpeg/FFmpegHeaders.hpp	2012-01-05 13:08:46.000000000 +0100
+++ osggit/OpenSceneGraph/src/osgPlugins/ffmpeg/FFmpegHeaders.hpp	2012-01-05 13:10:07.000000000 +0100
@@ -12,6 +12,7 @@
 #include <avcodec.h>
 #include <avformat.h>
 #include <avdevice.h>
+#include <mathematics.h>
 
 #ifdef USE_SWSCALE    
     #include <swscale.h>
