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-rw-r--r--rust/syn/parse_macro_input.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/rust/syn/parse_macro_input.rs b/rust/syn/parse_macro_input.rs
index f0660aedd7df..2f977754d41c 100644
--- a/rust/syn/parse_macro_input.rs
+++ b/rust/syn/parse_macro_input.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
/// Parse the input TokenStream of a macro, triggering a compile error if the
/// tokens fail to parse.
///