diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index 40ba97b0d0..c40649d92c 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -2161,6 +2161,7 @@ int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size,
                 pc->frame_start_found = 4;
             }
             if (state == SEQ_END_CODE) {
+                pc->frame_start_found = 0;
                 pc->state=-1;
                 return i+1;
             }