diff --git a/net-libs/libwebsockets/metadata.xml b/net-libs/libwebsockets/metadata.xml
index fc41506b82177..d8e0bc1dddcd6 100644
--- a/net-libs/libwebsockets/metadata.xml
+++ b/net-libs/libwebsockets/metadata.xml
@@ -11,6 +11,7 @@
 		<flag name="extensions">Compile with extensions (permessage-deflate)</flag>
 		<flag name="generic-sessions">With the Generic Sessions plugin</flag>
 		<flag name="http-proxy">Support for rewriting HTTP proxying</flag>
+		<flag name="ipv6">Compile without support for ipv6</flag>
 		<flag name="lejp">With the Lightweight JSON Parser</flag>
 		<flag name="libev">Support event loops via <pkg>dev-libs/libev</pkg></flag>
 		<flag name="libevent">Support event loops via <pkg>dev-libs/libevent</pkg></flag>