diff -u lib.old/cyrusdb_berkeley.c lib/cyrusdb_berkeley.c
--- lib.old/cyrusdb_berkeley.c	2007-04-05 01:23:42.518845824 +0200
+++ lib/cyrusdb_berkeley.c	2007-04-05 01:22:20.000000000 +0200
@@ -159,7 +159,15 @@
 	syslog(LOG_WARNING,
 	       "DBERROR: invalid berkeley_locks_max value, using internal default");
     } else {
+#if DB_VERSION_MAJOR >= 4
+  r = dbenv->set_lk_max_locks(dbenv, opt);
+  if (!r)
+  r = dbenv->set_lk_max_lockers(dbenv, opt);
+  if (!r)
+  r = dbenv->set_lk_max_objects(dbenv, opt);
+#else
 	r = dbenv->set_lk_max(dbenv, opt);
+#endif
 	if (r) {
 	    dbenv->err(dbenv, r, "set_lk_max");
 	    syslog(LOG_ERR, "DBERROR: set_lk_max(): %s", db_strerror(r));