diff --git a/core/state/statedb.go b/core/state/statedb.go
index 2fd5518237..8d706625b2 100644
--- a/core/state/statedb.go
+++ b/core/state/statedb.go
@@ -267,6 +267,7 @@ func (self *StateDB) GetCodeSize(addr common.Address) int {
 	return size
 }
 
+// GetCodeHash returns the hash of the code associated with the address.
 func (self *StateDB) GetCodeHash(addr common.Address) common.Hash {
 	stateObject := self.GetStateObject(addr)
 	if stateObject == nil {