diff --git a/ChangeLog.adoc b/ChangeLog.adoc
index 845c95952..ae69681d3 100644
--- a/ChangeLog.adoc
+++ b/ChangeLog.adoc
@@ -62,6 +62,7 @@ Bug fixes::
   * irc: update autojoin option with redirected channels when autojoin_dynamic is enabled (issue #1898)
   * irc: don't switch to buffer of joined channel if it was not manually joined nor present in server autojoin option
   * irc: fix target buffer for commands 432/433 (erroneous nickname/nickname already in use) when the nickname looks like a channel
+  * irc: add message 415 (cannot send message to channel)
   * lua: fix crash with print when the value to print is not a string (issue #1904, issue #1905)
   * spell: check buffer pointer received in info "spell_dict"
   * typing: fix crash when pointer buffer is not received in callback for signal "input_text_changed" (issue #1869)
diff --git a/src/plugins/irc/irc-protocol.c b/src/plugins/irc/irc-protocol.c
index 2e25627e0..8439cc674 100644
--- a/src/plugins/irc/irc-protocol.c
+++ b/src/plugins/irc/irc-protocol.c
@@ -7550,6 +7550,7 @@ irc_protocol_recv_command (struct t_irc_server *server,
         IRCB(412, 1, 0, generic_error),  /* no text to send                 */
         IRCB(413, 1, 0, generic_error),  /* no toplevel                     */
         IRCB(414, 1, 0, generic_error),  /* wilcard in toplevel domain      */
+        IRCB(415, 1, 0, generic_error),  /* cannot send message to channel  */
         IRCB(421, 1, 0, generic_error),  /* unknown command                 */
         IRCB(422, 1, 0, generic_error),  /* MOTD is missing                 */
         IRCB(423, 1, 0, generic_error),  /* no administrative info          */
diff --git a/tests/unit/plugins/irc/test-irc-protocol.cpp b/tests/unit/plugins/irc/test-irc-protocol.cpp
index ad83803ae..ca6bced25 100644
--- a/tests/unit/plugins/irc/test-irc-protocol.cpp
+++ b/tests/unit/plugins/irc/test-irc-protocol.cpp
@@ -3830,6 +3830,29 @@ TEST(IrcProtocolWithServer, 404)
     CHECK_SRV("-- #test2: Cannot send to channel");
 }
 
+/*
+ * Tests functions:
+ *   irc_protocol_cb_415 (cannot send to channel)
+ */
+
+TEST(IrcProtocolWithServer, 415)
+{
+    SRV_INIT_JOIN;
+
+    /* not enough parameters */
+    RECV(":server 415");
+    CHECK_ERROR_PARAMS("415", 0, 2);
+    RECV(":server 415 alice");
+    CHECK_ERROR_PARAMS("415", 1, 2);
+
+    RECV(":server 415 alice #test");
+    CHECK_SRV("-- #test");
+    RECV(":server 415 alice #test :Cannot send message to channel (+R)");
+    CHECK_CHAN("-- #test: Cannot send message to channel (+R)");
+    RECV(":server 415 alice #test2 :Cannot send message to channel (+R)");
+    CHECK_SRV("-- #test2: Cannot send message to channel (+R)");
+}
+
 /*
  * Tests functions:
  *   irc_protocol_cb_432 (erroneous nickname, not connected)