diff --git a/ethdb/memory_database.go b/ethdb/memory_database.go
index 727f2f7ca3..6f28bae024 100644
--- a/ethdb/memory_database.go
+++ b/ethdb/memory_database.go
@@ -23,9 +23,7 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 )
 
-/*
- * This is a test memory database. Do not use for any production it does not get persisted
- */
+// This is a test memory database. Do not use for any production, it does not get persisted.
 type MemDatabase struct {
 	db   map[string][]byte
 	lock sync.RWMutex