1 files changed, 1 insertions, 1 deletions
diff --git a/libavutil/opt.c b/libavutil/opt.c
index 2d4f873847..d749259c08 100644
--- a/libavutil/opt.c
+++ b/libavutil/opt.c
@@ -575,7 +575,7 @@ const AVOption *av_opt_find(void *obj, const char *name, const char *unit,
     while (o = av_next_option(obj, o)) {
         if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&
             ((!unit && o->type != FF_OPT_TYPE_CONST) ||
-             (unit  && o->unit && !strcmp(o->unit, unit))))
+             (unit  && o->type == FF_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit))))
             return o;
     }
     return NULL;