diff --git a/include/proto/auth.h b/include/proto/auth.h
index a960613..eea5df5 100644
--- a/include/proto/auth.h
+++ b/include/proto/auth.h
@@ -22,7 +22,7 @@
 unsigned int auth_resolve_groups(struct userlist *l, char *groups);
 int userlist_postinit();
 void userlist_free(struct userlist *ul);
-enum pat_match_res pat_match_auth(struct sample *smp, struct pattern *pattern);
+struct pattern *pat_match_auth(struct sample *smp, struct pattern_expr *expr, int fill);
 int check_user(struct userlist *ul, const char *user, const char *pass);
 int check_group(struct userlist *ul, char *name);