$OpenBSD: patch-imap_pop3login_c,v 1.3 2011/05/09 09:30:26 giovanni Exp $
--- imap/pop3login.c.orig	Mon Apr  4 17:02:32 2011
+++ imap/pop3login.c	Wed Apr 13 15:53:46 2011
@@ -212,7 +212,7 @@ static int login_callback(struct authinfo *ainfo, void
 				execl(pop3d, pop3d,
 				      ainfo->maildir ?
 				      ainfo->maildir:defaultmaildir,
-				      NULL);
+				      (char *)NULL);
 				fprintf(stderr, "ERR: exec(%s) failed!!\n",
 							 pop3d);
 			}
