diff --git a/src/ERC1155SeaDrop.sol b/src/ERC1155SeaDrop.sol
index b6a6d98..f3f1194 100644
--- a/src/ERC1155SeaDrop.sol
+++ b/src/ERC1155SeaDrop.sol
@@ -68,7 +68,7 @@ contract ERC1155SeaDrop is ERC1155SeaDropContractOfferer {
         address from,
         uint256[] calldata ids,
         uint256[] calldata amounts
-    ) external {
+    ) external virtual {
         // Burn the tokens.
         _batchBurn(msg.sender, from, ids, amounts);
     }