diff --git a/docs/HTTP2.md b/docs/HTTP2.md
index c9fb608fd..c2ff9af73 100644
--- a/docs/HTTP2.md
+++ b/docs/HTTP2.md
@@ -86,7 +86,9 @@ in HTTP 1.1 style. This allows applications to work unmodified.
 curl tool
 ---------
 
-curl offers the `--http2` command line option to enable use of HTTP/2
+curl offers the `--http2` command line option to enable use of HTTP/2.
+
+Since 7.47.0, the curl tool enables HTTP/2 by default for HTTPS connections.
 
 HTTP Alternative Services
 -------------------------