diff --git a/src/plugins/irc/irc-command.c b/src/plugins/irc/irc-command.c
index b8c43fef8..2b96d2550 100644
--- a/src/plugins/irc/irc-command.c
+++ b/src/plugins/irc/irc-command.c
@@ -6300,7 +6300,7 @@ irc_command_init ()
            "Without argument, \"ls\" and \"list\" are sent.\n"
            "\n"
            "Capabilities supported by WeeChat are: "
-           "account-notify, away-notify, cap-notify, extended-join, "
+           "account-notify, away-notify, cap-notify, chghost, extended-join, "
            "multi-prefix, server-time, userhost-in-names.\n"
            "\n"
            "The capabilities to automatically enable on servers can be set "
diff --git a/src/plugins/irc/irc-command.h b/src/plugins/irc/irc-command.h
index 4fdcf862f..b3b2a7e6f 100644
--- a/src/plugins/irc/irc-command.h
+++ b/src/plugins/irc/irc-command.h
@@ -51,7 +51,7 @@ struct t_irc_channel;
 
 /* list of supported capabilities (for completion in command /cap) */
 #define IRC_COMMAND_CAP_SUPPORTED_COMPLETION \
-    "account-notify|away-notify|cap-notify|extended-join|"              \
+    "account-notify|away-notify|cap-notify|chghost|extended-join|"      \
     "multi-prefix|server-time|userhost-in-names|%*"
 
 /* list of supported CTCPs (for completion in command /ctcp) */