diff --git a/core/vm/contract.go b/core/vm/contract.go
index 4d2cd9df7a..f436c8d387 100644
--- a/core/vm/contract.go
+++ b/core/vm/contract.go
@@ -94,7 +94,7 @@ func (c *Contract) validJumpdest(dest *big.Int) bool {
 	}
 	var analysis bitvec
 	// Do we have a contract hash already?
-	if c.CodeHash != emptyCodeHash {
+	if c.CodeHash != (common.Hash{}) {
 		var exist bool
 		// Does parent context have the analysis?
 		analysis, exist = c.jumpdests[c.CodeHash]
diff --git a/core/vm/evm.go b/core/vm/evm.go
index 9d130e842f..968d2219ea 100644
--- a/core/vm/evm.go
+++ b/core/vm/evm.go
@@ -358,7 +358,7 @@ type codeAndHash struct {
 }
 
 func (c *codeAndHash) Hash() common.Hash {
-	if c.hash == emptyCodeHash {
+	if c.hash == (common.Hash{}) {
 		c.hash = crypto.Keccak256Hash(c.code)
 	}
 	return c.hash