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-rw-r--r--libexec/ypxfr/ypxfr_extern.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/libexec/ypxfr/ypxfr_extern.h b/libexec/ypxfr/ypxfr_extern.h
index f843b645b6dd..6929bf38f27e 100644
--- a/libexec/ypxfr/ypxfr_extern.h
+++ b/libexec/ypxfr/ypxfr_extern.h
@@ -1,4 +1,6 @@
-/*
+/*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
* Copyright (c) 1995
* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
*