diff --git a/libavformat/oggdec.c b/libavformat/oggdec.c
index a099eb382e..78cfbd6af5 100644
--- a/libavformat/oggdec.c
+++ b/libavformat/oggdec.c
@@ -142,6 +142,7 @@ static int ogg_reset(AVFormatContext *s)
         if (start_pos <= s->data_offset) {
             os->lastpts = 0;
         }
+        os->end_trimming = 0;
     }
 
     ogg->page_pos = -1;