diff --git a/servers/slapd/ldapsync.c b/servers/slapd/ldapsync.c
index 771f5d331d..b3a3285ef3 100644
--- a/servers/slapd/ldapsync.c
+++ b/servers/slapd/ldapsync.c
@@ -169,16 +169,16 @@ slap_parse_csn_sids( BerVarray csns, int numcsns, void *memctx )
 static slap_mr_match_func sidsort_cmp;
 
 static const MatchingRule sidsort_mr = {
-	{},
+	{ 0 },
 	NULL,
-	{},
-	{},
+	{ 0 },
+	{ 0 },
 	0,
 	NULL, NULL, NULL, sidsort_cmp
 };
 static const AttributeType sidsort_at = {
-	{},
-	{},
+	{ 0 },
+	{ 0 },
 	NULL, NULL, (MatchingRule *)&sidsort_mr,
 	NULL, NULL, NULL, NULL, NULL, NULL, NULL, SLAP_AT_SORTED_VAL
 };