diff --git a/ChangeLog.adoc b/ChangeLog.adoc
index a57de7dc5..3987fe3f0 100644
--- a/ChangeLog.adoc
+++ b/ChangeLog.adoc
@@ -22,6 +22,10 @@ New features::
 
   * api: add user variables in evaluation of expressions with "define:name,value"
 
+Bug fixes::
+
+  * irc: fix parsing of TAGMSG message when there is a colon before the channel
+
 [[v3.3]]
 == Version 3.3 (2021-09-19)
 
diff --git a/src/plugins/irc/irc-protocol.c b/src/plugins/irc/irc-protocol.c
index 808f14f31..624a126df 100644
--- a/src/plugins/irc/irc-protocol.c
+++ b/src/plugins/irc/irc-protocol.c
@@ -2978,12 +2978,14 @@ IRC_PROTOCOL_CALLBACK(setname)
  *
  * Message looks like:
  *   @msgid=6gqz7dxd22v7r3x9pvu;+typing=active :nick!user@host TAGMSG #channel
+ *   @msgid=6gqz7dxd22v7r3x9pvu;+typing=active :nick!user@host TAGMSG :#channel
  */
 
 IRC_PROTOCOL_CALLBACK(tagmsg)
 {
     struct t_irc_channel *ptr_channel;
     const char *ptr_typing_value;
+    char *pos_channel;
     int state;
 
     IRC_PROTOCOL_MIN_ARGS(3);
@@ -2994,10 +2996,12 @@ IRC_PROTOCOL_CALLBACK(tagmsg)
     if (!tags)
         return WEECHAT_RC_OK;
 
+    pos_channel = (argv[2][0] == ':') ? argv[2] + 1 : argv[2];
+
     ptr_channel = NULL;
-    if (irc_channel_is_channel (server, argv[2]))
-        ptr_channel = irc_channel_search (server, argv[2]);
-    else if (irc_server_strcasecmp (server, argv[2], server->nick) == 0)
+    if (irc_channel_is_channel (server, pos_channel))
+        ptr_channel = irc_channel_search (server, pos_channel);
+    else if (irc_server_strcasecmp (server, pos_channel, server->nick) == 0)
         ptr_channel = irc_channel_search (server, nick);
     if (!ptr_channel)
         return WEECHAT_RC_OK;