diff --git a/src/chmode.c b/src/chmode.c
index 442d6f1..0301dfd 100644
--- a/src/chmode.c
+++ b/src/chmode.c
@@ -2066,6 +2066,8 @@ set_channel_mode(struct Client *client_p, struct Client *source_p,
 				  source_p->name, source_p->username,
 				  source_p->host, chptr->chname);
 
+	mlen = 0;
+
 	for (override = 0; override < (IsOverride(source_p) && alevel != CHFL_CHANOP ? 2 : 1); ++override)
 	{
 		int was_on_chan = 0;