diff --git a/servers/slapd/back-monitor/conn.c b/servers/slapd/back-monitor/conn.c
index ad7ab23240..070f8524f9 100644
--- a/servers/slapd/back-monitor/conn.c
+++ b/servers/slapd/back-monitor/conn.c
@@ -34,6 +34,7 @@
 #include "portable.h"
 
 #include <stdio.h>
+#include "lutil.h"
 
 #include "slap.h"
 #include "back-monitor.h"