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-rw-r--r--libraries/optional-bare/include/nonstd/optional2
1 files changed, 1 insertions, 1 deletions
diff --git a/libraries/optional-bare/include/nonstd/optional b/libraries/optional-bare/include/nonstd/optional
index ecbfa030d1..bcb06d571c 100644
--- a/libraries/optional-bare/include/nonstd/optional
+++ b/libraries/optional-bare/include/nonstd/optional
@@ -1,4 +1,4 @@
-//
+// SPDX-License-Identifier: BSL-1.0
// Copyright 2017-2019 by Martin Moene
//
// https://github.com/martinmoene/optional-bare