diff --git a/setup.py b/setup.py
index 625b6f572..f11951415 100644
--- a/setup.py
+++ b/setup.py
@@ -514,7 +514,7 @@ def get_pow_block(hash: Bytes32) -> Optional[PowBlock]:
     return PowBlock(block_hash=hash, parent_hash=Bytes32(), total_difficulty=uint256(0))
 
 
-def get_execution_state(execution_state_root: Bytes32) -> ExecutionState:
+def get_execution_state(_execution_state_root: Bytes32) -> ExecutionState:
     pass