diff --git a/libavcodec/speedhq.c b/libavcodec/speedhq.c
index 890b8253cd..948b813f7f 100644
--- a/libavcodec/speedhq.c
+++ b/libavcodec/speedhq.c
@@ -424,7 +424,7 @@ static int speedhq_decode_frame(AVCodecContext *avctx,
     uint32_t second_field_offset;
     int ret;
 
-    if (buf_size < 4)
+    if (buf_size < 4 || avctx->width < 8)
         return AVERROR_INVALIDDATA;
 
     quality = buf[0];