diff -Naur postfix-1.1.11.orig/src/util/dict_db.c postfix-1.1.11/src/util/dict_db.c
--- postfix-1.1.11.orig/src/util/dict_db.c	Mon Oct 14 18:54:26 2002
+++ postfix-1.1.11/src/util/dict_db.c	Mon Oct 14 19:14:12 2002
@@ -429,6 +429,10 @@
     struct stat st;
     DB     *db;
     char   *db_path;
+#if (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
+    DB_TXN *db_txnp = NULL;
+    static DB_ENV *db_env = NULL;
+#endif
     int     lock_fd = -1;
     int     dbfd;
 
@@ -512,7 +516,7 @@
 	db_flags |= DB_CREATE;
     if (open_flags & O_TRUNC)
 	db_flags |= DB_TRUNCATE;
-    if ((errno = db_create(&db, 0, 0)) != 0)
+    if ((errno = db_create(&db, db_env, 0)) != 0)
 	msg_fatal("create DB database: %m");
     if (db == 0)
 	msg_panic("db_create null result");
@@ -520,10 +524,18 @@
 	msg_fatal("set DB cache size %d: %m", DICT_DB_CACHE_SIZE);
     if (type == DB_HASH && db->set_h_nelem(db, DICT_DB_NELM) != 0)
 	msg_fatal("set DB hash element count %d: %m", DICT_DB_NELM);
+
+#if (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
+    if ((errno = db_env->txn_begin(db_env, NULL, &db_txnp, 0)) != 0)
+	msg_fatal("begin transaction failed: %m");
+    if ((errno = db->open(db, db_txnp, db_path, 0, type, db_flags, 0644)) != 0)
+	msg_fatal("open database %s: %m", db_path);
+#else
     if ((errno = db->open(db, db_path, 0, type, db_flags, 0644)) != 0)
 	msg_fatal("open database %s: %m", db_path);
     if ((errno = db->fd(db, &dbfd)) != 0)
 	msg_fatal("get database file descriptor: %m");
+#endif
 #endif
     if (dict_flags & DICT_FLAG_LOCK) {
 	if (myflock(lock_fd, INTERNAL_LOCK, MYFLOCK_OP_NONE) < 0)