diff --git a/src/channel.c b/src/channel.c
index be0dc19..1f6df41 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -2099,7 +2099,7 @@
 {
     chanpart_T *chanpart = &channel->ch_part[part];
     char	namebuf[20];
-    int		tail;
+    size_t	tail;
     char	*s;
 
     STRCPY(namebuf, name);