diff --git a/packages/token/src/common/erc2981/interface.cairo b/packages/token/src/common/erc2981/interface.cairo
index 1721a6f7a..cc5ba0e69 100644
--- a/packages/token/src/common/erc2981/interface.cairo
+++ b/packages/token/src/common/erc2981/interface.cairo
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// OpenZeppelin Contracts for Cairo v0.16.0 (token/common/erc2981/interface.cairo)
+
 use starknet::ContractAddress;
 
 pub const IERC2981_ID: felt252 = 0x2d3414e45a8700c29f119a54b9f11dca0e29e06ddcb214018fc37340e165ed6;