diff -urN xbmc-11.0-Eden_rc2.old/configure.in xbmc-11.0-Eden_rc2/configure.in
--- xbmc-11.0-Eden_rc2.old/configure.in	2012-03-20 10:37:34.768505751 +0100
+++ xbmc-11.0-Eden_rc2/configure.in	2012-03-20 11:05:32.171534968 +0100
@@ -1225,6 +1225,9 @@
   # old FFmpeg have this in libavcodec/opt.h instead:
   AC_CHECK_HEADERS([libavutil/opt.h])
 
+  # new FFmpeg have math headers
+  AC_CHECK_HEADERS([libavutil/mathematics.h],,)
+
   # We'll support the use of rgb2rgb.h if it exists.
   AC_CHECK_HEADERS([libswscale/rgb2rgb.h],,)
   AC_CHECK_HEADERS([ffmpeg/rgb2rgb.h],,)
diff -urN xbmc-11.0-Eden_rc2.old/lib/DllAvUtil.h xbmc-11.0-Eden_rc2/lib/DllAvUtil.h
--- xbmc-11.0-Eden_rc2.old/lib/DllAvUtil.h	2012-03-20 10:37:34.776505751 +0100
+++ xbmc-11.0-Eden_rc2/lib/DllAvUtil.h	2012-03-20 11:07:11.714536696 +0100
@@ -59,6 +59,9 @@
   #else
     #include <ffmpeg/mem.h>
   #endif
+  #if (defined HAVE_LIBAVUTIL_MATHEMATICS_H)
+    #include <libavutil/mathematics.h>
+  #endif
 #else
   #include "libavutil/avutil.h"
   #include "libavutil/crc.h"