diff --git a/CHANGELOG.md b/CHANGELOG.md
index ce1fa1b3f..1e2a760da 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -29,6 +29,7 @@ SPDX-License-Identifier: GPL-3.0-or-later
 - relay/api: return an error 401 (Unauthorized) when header "x-weechat-totp" has an invalid value
 - xfer: add buffer local variable "server" in DCC CHAT buffers
 - core, irc, relay: add tag "tls" in gnutls messages
+- irc: add tags "irc_cap" and "log3" in client capability request and SASL not supported messages
 - build: require Curl ≥ 7.68.0 ([#2268](https://github.com/weechat/weechat/issues/2268))
 - build: require GnuTLS ≥ 3.6.3 ([#2268](https://github.com/weechat/weechat/issues/2268))
 - build: require libgcrypt ≥ 1.8.0 ([#2268](https://github.com/weechat/weechat/issues/2268))
diff --git a/src/plugins/irc/irc-protocol.c b/src/plugins/irc/irc-protocol.c
index 39f3d5826..539f347ad 100644
--- a/src/plugins/irc/irc-protocol.c
+++ b/src/plugins/irc/irc-protocol.c
@@ -829,8 +829,8 @@ irc_protocol_cap_sync_req (struct t_irc_server *server,
         ptr_caps_req = (new_caps_req) ? new_caps_req : caps_req;
         if (ptr_caps_req && ptr_caps_req[0])
         {
-            weechat_printf (
-                server->buffer,
+            weechat_printf_date_tags (
+                server->buffer, 0, "irc_cap,log3",
                 _("%s%s: client capability, requesting: %s"),
                 weechat_prefix ("network"), IRC_PLUGIN_NAME,
                 ptr_caps_req);
@@ -918,8 +918,8 @@ irc_protocol_cap_sync (struct t_irc_server *server, int sasl, int cap_new_receiv
                 irc_server_sendf (server, 0, NULL, "CAP END");
             if (sasl_requested && !sasl_to_do && !cap_new_received)
             {
-                weechat_printf (
-                    server->buffer,
+                weechat_printf_date_tags (
+                    server->buffer, 0, "irc_cap,log3",
                     _("%s%s: client capability: SASL not supported"),
                     weechat_prefix ("network"), IRC_PLUGIN_NAME);