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-rw-r--r--usr.bin/tr/extern.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/usr.bin/tr/extern.h b/usr.bin/tr/extern.h
index 2076119fd819..e939d2cf780d 100644
--- a/usr.bin/tr/extern.h
+++ b/usr.bin/tr/extern.h
@@ -1,4 +1,6 @@
/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*