diff --git a/core/evm.go b/core/evm.go
index 0f5aa5d281209..5901bbfb6aa7d 100644
--- a/core/evm.go
+++ b/core/evm.go
@@ -31,7 +31,7 @@ type ChainContext interface {
 	// Engine retrieves the chain's consensus engine.
 	Engine() consensus.Engine
 
-	// GetHeader returns the hash corresponding to their hash.
+	// GetHeader returns the header corresponding to the hash/number argument pair.
 	GetHeader(common.Hash, uint64) *types.Header
 	// SYSCOIN
 	ReadSYSHash(uint64) []byte