diff --git a/libavformat/dhav.c b/libavformat/dhav.c
index 8e08274e68..b2ead99609 100644
--- a/libavformat/dhav.c
+++ b/libavformat/dhav.c
@@ -278,7 +278,9 @@ static int dhav_read_header(AVFormatContext *s)
     if (ret < 0)
         return ret;
 
-    avio_read(s->pb, signature, sizeof(signature));
+    ret = ffio_read_size(s->pb, signature, sizeof(signature));
+    if (ret < 0)
+        return ret;
     if (!memcmp(signature, "DAHUA", 5)) {
         avio_skip(s->pb, 0x400 - 5);
         dhav->last_good_pos = avio_tell(s->pb);