diff --git a/libmpdvdkit2/libdvdread_changes.diff b/libmpdvdkit2/libdvdread_changes.diff
index 9ede5c6a77..fd468492b9 100644
--- a/libmpdvdkit2/libdvdread_changes.diff
+++ b/libmpdvdkit2/libdvdread_changes.diff
@@ -162,7 +162,7 @@ diff -Naur dvdread.orig/dvd_reader.c dvdread/dvd_reader.c
 +#ifndef HAVE_MPLAYER
 + #include "get_path.c"
 +#else
-+ extern char * get_path( char * filename );
++ extern char * get_path( const char * filename );
 +#endif
 +
 +//extern char * dvdcss_cache_dir;