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-rw-r--r--rust/syn/precedence.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/rust/syn/precedence.rs b/rust/syn/precedence.rs
index 1891bfc202fd..cc4dba24a433 100644
--- a/rust/syn/precedence.rs
+++ b/rust/syn/precedence.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
#[cfg(all(feature = "printing", feature = "full"))]
use crate::attr::{AttrStyle, Attribute};
#[cfg(feature = "printing")]