diff --git a/erigon-lib/chain/chain_config.go b/erigon-lib/chain/chain_config.go
index eca0a214554..cab6b90cac9 100644
--- a/erigon-lib/chain/chain_config.go
+++ b/erigon-lib/chain/chain_config.go
@@ -509,7 +509,7 @@ type Rules struct {
 	IsByzantium, IsConstantinople, IsPetersburg       bool
 	IsIstanbul, IsBerlin, IsLondon, IsShanghai        bool
 	IsCancun, IsNapoli                                bool
-	IsPrague, isOsaka                                 bool
+	IsPrague, IsOsaka                                 bool
 	IsAura                                            bool
 }
 
@@ -535,7 +535,7 @@ func (c *Config) Rules(num uint64, time uint64) *Rules {
 		IsCancun:           c.IsCancun(time),
 		IsNapoli:           c.IsNapoli(num),
 		IsPrague:           c.IsPrague(time),
-		isOsaka:            c.IsOsaka(time),
+		IsOsaka:            c.IsOsaka(time),
 		IsAura:             c.Aura != nil,
 	}
 }