diff --git a/params/config.go b/params/config.go
index 719a05df12..978700fff2 100644
--- a/params/config.go
+++ b/params/config.go
@@ -574,12 +574,12 @@ func (c *ChainConfig) IsOnPlato(num *big.Int) bool {
 	return configNumEqual(c.PlatoBlock, num)
 }
 
-// IsHertz returns whether num is either equal to the EIPs of Berlin block.
+// IsHertz returns whether num is either equal to the block of enabling Berlin EIPs or greater.
 func (c *ChainConfig) IsHertz(num *big.Int) bool {
 	return isForked(c.HertzBlock, num)
 }
 
-// IsOnHertz returns whether num is equal to the EIPs of Berlin fork block.
+// IsOnHertz returns whether num is equal to the fork block of enabling Berlin EIPs.
 func (c *ChainConfig) IsOnHertz(num *big.Int) bool {
 	return configNumEqual(c.HertzBlock, num)
 }