diff --git a/src/supported.c b/src/supported.c
index f34562e..b892b50 100644
--- a/src/supported.c
+++ b/src/supported.c
@@ -325,4 +325,5 @@ init_isupport(void)
 	add_isupport("TARGMAX", isupport_targmax, NULL);
 	add_isupport("EXTBAN", isupport_extban, NULL);
 	add_isupport("WHOX", isupport_string, "");
+	add_isupport("CLIENTVER", isupport_string, "3.0");
 }