diff --git a/src/s_user.c b/src/s_user.c
index 1fc9661..3e605e5 100644
--- a/src/s_user.c
+++ b/src/s_user.c
@@ -1506,7 +1506,7 @@ change_nick_user_host(struct Client *target_p,	const char *nick, const char *use
 	int changed = irccmp(target_p->name, nick);
 	int changed_case = strcmp(target_p->name, nick);
 	int do_qjm = irccmp(target_p->username, user) || (irccmp(target_p->host, host) && ConfigChannel.cycle_host_change);
-	char mode[10], modeval[NICKLEN * 2 + 2], reason[256], *mptr;
+	char mode[10], modeval[NICKLEN * 4 + 4], reason[256], *mptr;
 	va_list ap;
 
 	modeval[0] = '\0';