diff --git a/consensus/consensus.go b/consensus/consensus.go
index bd0e22753d..efb0ddf28c 100644
--- a/consensus/consensus.go
+++ b/consensus/consensus.go
@@ -80,7 +80,7 @@ type Engine interface {
 	Prepare(chain ChainReader, header *types.Header) error
 
 	// Finalize runs any post-transaction state modifications (e.g. block rewards)
-	// but does not assemble the block
+	// but does not assemble the block.
 	// Note: The block header and state database might be updated to reflect any
 	// consensus rules that happen at finalization (e.g. block rewards).
 	Finalize(chain ChainReader, header *types.Header, state *state.StateDB, txs []*types.Transaction,