diff --git a/libavformat/mov.c b/libavformat/mov.c
index 7ab2808c85..0eb7272830 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -4936,7 +4936,7 @@ static int mov_seek_fragment(AVFormatContext *s, AVStream *st, int64_t timestamp
 
     for (i = 0; i < mov->fragment_index_count; i++) {
         if (mov->fragment_index_data[i]->track_id == st->id) {
-            MOVFragmentIndex *index = index = mov->fragment_index_data[i];
+            MOVFragmentIndex *index = mov->fragment_index_data[i];
             for (j = index->item_count - 1; j >= 0; j--) {
                 if (index->items[j].time <= timestamp) {
                     if (index->items[j].headers_read)