diff --git a/setup.py b/setup.py
index 514f75c50..b337d70ff 100644
--- a/setup.py
+++ b/setup.py
@@ -313,11 +313,13 @@ def get_pow_chain_head() -> PowBlock:
     pass
 
 
-def execution_state_transition(execution_state: ExecutionState, execution_payload: ExecutionPayload) -> None:
+def execution_state_transition(execution_state_root: Bytes32,
+                               execution_payload: ExecutionPayload,
+                               timestamp: uint64) -> None:
     pass
 
 
-def produce_execution_payload(parent_hash: Bytes32) -> ExecutionPayload:
+def produce_execution_payload(parent_hash: Hash32, timestamp: uint64) -> ExecutionPayload:
     pass"""