diff --git a/libavformat/icecast.c b/libavformat/icecast.c
index 973c0c26a2..a7c7001f03 100644
--- a/libavformat/icecast.c
+++ b/libavformat/icecast.c
@@ -115,11 +115,11 @@ static int icecast_open(URLContext *h, const char *uri, int flags)
     av_dict_set(&opt_dict, "auth_type", "basic", 0);
     av_dict_set(&opt_dict, "headers", headers, 0);
     av_dict_set(&opt_dict, "chunked_post", "0", 0);
+    av_dict_set(&opt_dict, "send_expect_100", s->legacy_icecast ? "0" : "1", 0);
     if (NOT_EMPTY(s->content_type))
         av_dict_set(&opt_dict, "content_type", s->content_type, 0);
     else
         av_dict_set(&opt_dict, "content_type", "audio/mpeg", 0);
-    av_dict_set(&opt_dict, "send_expect_100", s->legacy_icecast ? "0" : "1", 0);
     if (NOT_EMPTY(s->user_agent))
         av_dict_set(&opt_dict, "user_agent", s->user_agent, 0);