diff --git a/servers/slurpd/reject.c b/servers/slurpd/reject.c
index e5ce9a76b6..c381204baa 100644
--- a/servers/slurpd/reject.c
+++ b/servers/slurpd/reject.c
@@ -52,13 +52,13 @@ write_reject(
     int		rc;
 
     ldap_pvt_thread_mutex_lock( &sglob->rej_mutex );
-    sprintf( rejfile, "%s/%s:%d.rej", sglob->slurpd_rdir,
-	    ri->ri_hostname, ri->ri_port );
+    snprintf( rejfile, sizeof(rejfile), "%s" LDAP_DIRSEP "%s:%d.rej",
+		sglob->slurpd_rdir, ri->ri_hostname, ri->ri_port );
 
     if ( access( rejfile, F_OK ) < 0 ) {
 	/* Doesn't exist - try to create */
 	int rjfd;
-	if (( rjfd = open( rejfile, O_RDWR | O_APPEND | O_CREAT,
+	if (( rjfd = open( rejfile, O_RDWR | O_APPEND | O_CREAT | O_EXCL,
 		S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP )) < 0 ) {
 	    Debug( LDAP_DEBUG_ANY,
 		"Error: write_reject: Cannot create \"%s\": %s\n",