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-rw-r--r--rust/syn/macros.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/rust/syn/macros.rs b/rust/syn/macros.rs
index 167f2cf260a7..8676f6492a9c 100644
--- a/rust/syn/macros.rs
+++ b/rust/syn/macros.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
#[cfg_attr(
not(any(feature = "full", feature = "derive")),
allow(unknown_lints, unused_macro_rules)