--- a/Makefile.include.in	2014-03-16 15:34:08.479015885 -0500
+++ b/Makefile.include.in	2014-03-16 18:58:00.770693019 -0500
@@ -58,6 +58,11 @@
 	@SDL_DEFINES@ \
 	@DEFS@ \
 
+ifeq (@USE_EXTERNAL_FFMPEG@,1)
+	DEFINES+=-DUSE_EXTERNAL_FFMPEG \
+
+endif
+
 ifeq ($(findstring osx,$(ARCH)), osx)
 	INCLUDES+=-I@abs_top_srcdir@/xbmc/osx
 endif