diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index 435b0be0b8..a1aa969cad 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -122,12 +122,9 @@ static const AVOption rtp_options[] = {
 static AVDictionary *map_to_opts(RTSPState *rt)
 {
     AVDictionary *opts = NULL;
-    char buf[256];
 
-    snprintf(buf, sizeof(buf), "%d", rt->buffer_size);
-    av_dict_set(&opts, "buffer_size", buf, 0);
-    snprintf(buf, sizeof(buf), "%d", rt->pkt_size);
-    av_dict_set(&opts, "pkt_size", buf, 0);
+    av_dict_set_int(&opts, "buffer_size", rt->buffer_size, 0);
+    av_dict_set_int(&opts, "pkt_size",    rt->pkt_size,    0);
 
     return opts;
 }