diff --git a/servers/slapd/back-perl/compare.c b/servers/slapd/back-perl/compare.c
index e03c486cd5..b9795bd295 100644
--- a/servers/slapd/back-perl/compare.c
+++ b/servers/slapd/back-perl/compare.c
@@ -21,6 +21,7 @@
 #include <EXTERN.h>
 #include <perl.h>
 
+#include "lutil.h"
 #include "perl_back.h"
 
 /**********************************************************