--- firefox-43.0.4/dom/media/webm/WebMDemuxer.cpp.orig	2016-01-23 01:35:10.445510475 +0100
+++ firefox-43.0.4/dom/media/webm/WebMDemuxer.cpp	2016-01-23 01:32:15.429882900 +0100
@@ -19,6 +19,7 @@
 #include "XiphExtradata.h"
 
 #include <algorithm>
+#include "prprf.h"
 #include <stdint.h>
 
 #define VPX_DONT_DEFINE_STDINT_TYPES