diff --git a/libvo/vo_fbdev.c b/libvo/vo_fbdev.c
index a8675ee95b..52671058fd 100644
--- a/libvo/vo_fbdev.c
+++ b/libvo/vo_fbdev.c
@@ -50,10 +50,6 @@ static signed int pre_init_err = -2;
 *	fb.modes support      *
 ******************************/
 
-extern char *monitor_hfreq_str;
-extern char *monitor_vfreq_str;
-extern char *monitor_dotclock_str;
-
 static range_t *monitor_hfreq = NULL;
 static range_t *monitor_vfreq = NULL;
 static range_t *monitor_dotclock = NULL;