diff --git a/leader/src/padding_and_withdrawals.rs b/leader/src/padding_and_withdrawals.rs
index dde429e..dff68d4 100644
--- a/leader/src/padding_and_withdrawals.rs
+++ b/leader/src/padding_and_withdrawals.rs
@@ -87,7 +87,7 @@ pub(crate) fn pad_gen_inputs_with_dummy_inputs_if_needed(
 /// - If no dummy proofs are already present, then a dummy proof that just
 ///   contains the withdrawals is appended to the end of the IR vec.
 pub(crate) fn add_withdrawals_to_txns(
-    txn_ir: &mut Vec<GenerationInputs>,
+    txn_ir: &mut [GenerationInputs],
     final_trie_state: &mut PartialTrieState,
     withdrawals: Vec<(Address, U256)>,
 ) {