diff --git a/libavformat/http.c b/libavformat/http.c
index ec60bc0b17..b674171d3c 100644
--- a/libavformat/http.c
+++ b/libavformat/http.c
@@ -1849,7 +1849,7 @@ static int store_icy(URLContext *h, int size)
             ret = http_read_stream_all(h, data, len);
             if (ret < 0)
                 return ret;
-            data[len + 1] = 0;
+            data[len] = 0;
             if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
                 return ret;
             update_metadata(h, data);