1 files changed, 1 insertions, 1 deletions
diff --git a/lib/url.c b/lib/url.c
index 13d015753..05fc0e50e 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -546,7 +546,7 @@ CURLcode Curl_init_userdefined(struct Curl_easy *data)
   set->upkeep_interval_ms = CURL_UPKEEP_INTERVAL_DEFAULT;
   set->maxconnects = DEFAULT_CONNCACHE_SIZE; /* for easy handles */
   set->maxage_conn = 118;
-  set->http09_allowed = TRUE;
+  set->http09_allowed = FALSE;
   set->httpversion =
 #ifdef USE_NGHTTP2
     CURL_HTTP_VERSION_2TLS