diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index 647e7f0a74..395b86bbe7 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -1597,6 +1597,8 @@ static int decode_frame_lscr(AVCodecContext *avctx,
 
     if (avpkt->size < 2)
         return AVERROR_INVALIDDATA;
+    if (avpkt->size == 2)
+        return 0;
 
     bytestream2_init(gb, avpkt->data, avpkt->size);