diff --git a/src/plugins/irc/irc-message.c b/src/plugins/irc/irc-message.c
index d0fc2205a..26fbe6785 100644
--- a/src/plugins/irc/irc-message.c
+++ b/src/plugins/irc/irc-message.c
@@ -774,7 +774,7 @@ irc_message_split_authenticate (struct t_hashtable *hashtable,
                                 const char *command, const char *arguments)
 {
     int number, length;
-    char message[1024], *args;
+    char message[8192], *args;
     const char *ptr_args;
 
     number = 1;