diff --git a/modules/client/capabilities.cc b/modules/client/capabilities.cc
index 936fed492..1da21ff2f 100644
--- a/modules/client/capabilities.cc
+++ b/modules/client/capabilities.cc
@@ -76,6 +76,7 @@ ircd::m::client_capabilities::get(client &client,
 						{ "3", "stable"  },
 						{ "4", "stable"  },
 						{ "5", "stable"  },
+						{ "6", "stable"  },
 					}},
 				}},
 			}},