diff --git a/src/plugins/irc/irc-server.c b/src/plugins/irc/irc-server.c
index e15df5393..c094d85f9 100644
--- a/src/plugins/irc/irc-server.c
+++ b/src/plugins/irc/irc-server.c
@@ -2254,6 +2254,7 @@ irc_server_disconnect (struct t_irc_server *server, int reconnect)
         for (ptr_channel = server->channels; ptr_channel;
              ptr_channel = ptr_channel->next_channel)
         {
+            irc_nick_free_all (ptr_channel);
             weechat_printf (ptr_channel->buffer,
                             _("%s: disconnected from server"),
                             "irc");