diff --git a/libavformat/http.c b/libavformat/http.c
index 00cf295001..80c87f786a 100644
--- a/libavformat/http.c
+++ b/libavformat/http.c
@@ -682,6 +682,9 @@ static int http_connect(URLContext *h, const char *path, const char *local_path,
     s->willclose        = 0;
     s->end_chunked_post = 0;
     s->end_header       = 0;
+#if CONFIG_ZLIB
+    s->compressed       = 0;
+#endif
     if (post && !s->post_data && !send_expect_100) {
         /* Pretend that it did work. We didn't read any header yet, since
          * we've still to send the POST data, but the code calling this