diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 0bc0b3888f55b46adf039ff043f84eaaa910bbf2..62d4b264c30921b89259f1434f6e65f29f6beda7 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -1531,9 +1531,7 @@ int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *code
         } else if (avctx->channel_layout) {
             avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
         }
-        if(avctx->codec_type == AVMEDIA_TYPE_VIDEO &&
-           avctx->codec_id != AV_CODEC_ID_PNG // For mplayer
-        ) {
+        if(avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
             if (avctx->width <= 0 || avctx->height <= 0) {
                 av_log(avctx, AV_LOG_ERROR, "dimensions not set\n");
                 ret = AVERROR(EINVAL);