diff --git a/core/overlay/state_transition.go b/core/overlay/state_transition.go
index 90b5c9431a..67ca0f9671 100644
--- a/core/overlay/state_transition.go
+++ b/core/overlay/state_transition.go
@@ -60,6 +60,7 @@ func (ts *TransitionState) Copy() *TransitionState {
 		CurrentSlotHash:       ts.CurrentSlotHash,
 		CurrentPreimageOffset: ts.CurrentPreimageOffset,
 		StorageProcessed:      ts.StorageProcessed,
+		BaseRoot:              ts.BaseRoot,
 	}
 	if ts.CurrentAccountAddress != nil {
 		addr := *ts.CurrentAccountAddress