diff --git a/utils/phase0/state_transition.py b/utils/phase0/state_transition.py
index 92d67c45a..eefc3d409 100644
--- a/utils/phase0/state_transition.py
+++ b/utils/phase0/state_transition.py
@@ -97,4 +97,4 @@ def state_transition(state: BeaconState,
             process_epoch_transition(state)
         spec.advance_slot(state)
         if block.slot == state.slot:
-            process_block(state, block)
+            process_block(state, block, verify_state_root)