diff --git a/libavcodec/rv20enc.c b/libavcodec/rv20enc.c
index a6bacacb48..00f6c41e77 100644
--- a/libavcodec/rv20enc.c
+++ b/libavcodec/rv20enc.c
@@ -39,7 +39,7 @@ void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number){
     put_bits(&s->pb, 1, 0);     /* unknown bit */
     put_bits(&s->pb, 5, s->qscale);
 
-    put_sbits(&s->pb, 8, picture_number); //FIXME wrong, but correct is not known
+    put_sbits(&s->pb, 8, s->picture_number); //FIXME wrong, but correct is not known
     s->mb_x= s->mb_y= 0;
     ff_h263_encode_mba(s);