diff --git a/libavcodec/sunrast.c b/libavcodec/sunrast.c
index b21c26089e..c7af1fd126 100644
--- a/libavcodec/sunrast.c
+++ b/libavcodec/sunrast.c
@@ -93,7 +93,7 @@ static int sunrast_decode_frame(AVCodecContext *avctx, void *data,
         av_log(avctx, AV_LOG_ERROR, "unsupported (compression) type\n");
         return -1;
     }
-    if (type < RT_OLD || type > RT_FORMAT_IFF) {
+    if (type > RT_FORMAT_IFF) {
         av_log(avctx, AV_LOG_ERROR, "invalid (compression) type\n");
         return -1;
     }