diff --git a/servers/slapd/proto-slap.h b/servers/slapd/proto-slap.h
index 6e38694d9c..a4846b97d4 100644
--- a/servers/slapd/proto-slap.h
+++ b/servers/slapd/proto-slap.h
@@ -1095,6 +1095,7 @@ LDAP_SLAPD_F (int) get_filter LDAP_P((
 LDAP_SLAPD_F (void) filter_free LDAP_P(( Filter *f ));
 LDAP_SLAPD_F (void) filter_free_x LDAP_P(( Operation *op, Filter *f, int freeme ));
 LDAP_SLAPD_F (void) filter2bv LDAP_P(( Filter *f, struct berval *bv ));
+LDAP_SLAPD_F (void) filter2bv_x LDAP_P(( Operation *op, Filter *f, struct berval *bv ));
 LDAP_SLAPD_F (void) filter2bv_undef LDAP_P(( Filter *f, int noundef, struct berval *bv ));
 LDAP_SLAPD_F (void) filter2bv_undef_x LDAP_P(( Operation *op, Filter *f, int noundef, struct berval *bv ));
 LDAP_SLAPD_F (Filter *) filter_dup LDAP_P(( Filter *f, void *memctx ));