diff --git a/servers/slapd/index.c b/servers/slapd/index.c
index f4590ccf83..a076be5ea1 100644
--- a/servers/slapd/index.c
+++ b/servers/slapd/index.c
@@ -18,6 +18,7 @@
 
 #include <stdio.h>
 #include <ac/string.h>
+#include <lutil.h>
 
 #include "slap.h"