diff --git a/multimedia/libxine/Makefile b/multimedia/libxine/Makefile
index 88cfcf39a324..faeda900498c 100644
--- a/multimedia/libxine/Makefile
+++ b/multimedia/libxine/Makefile
@@ -69,6 +69,8 @@ OPTIONS_DEFINE=	CACA ESOUND JACK GNOMEVFS2 PULSEAUDIO XVMC SMB AALIB \
 		IMAGEMAGICK GTK2 WAVPACK VAAPI LIBBLURAY
 
 DOCSDIR=	${PREFIX}/share/doc/xine-lib
+# Please sync with XINE_PLUGINSDIR in multimedia/xine
+# and multimedia/vdr-plugin-xineliboutput
 PLIST_SUB=	PLUGINSDIR="lib/xine/plugins/2.3"
 
 # DVDCSS version hardcoded in src/input/input_dvd.c misc/cdda_server.c