diff --git a/eth/ethconfig/config.go b/eth/ethconfig/config.go
index 2da30216e0..28e1fccda1 100644
--- a/eth/ethconfig/config.go
+++ b/eth/ethconfig/config.go
@@ -107,7 +107,7 @@ type Config struct {
 
 	// Deprecated: LES server has been removed
 	// We retain this field for compatibility with config files created by `geth dumpconfig`.
-	LightPeers int `toml:"-"`
+	LightPeers int `toml:",omitempty"`
 
 	// Database options
 	SkipBcVersionCheck bool `toml:"-"`
diff --git a/eth/ethconfig/gen_config.go b/eth/ethconfig/gen_config.go
index 3ba377b5da..e2ec6f6691 100644
--- a/eth/ethconfig/gen_config.go
+++ b/eth/ethconfig/gen_config.go
@@ -29,7 +29,7 @@ func (c Config) MarshalTOML() (interface{}, error) {
 		StateHistory            uint64                 `toml:",omitempty"`
 		StateScheme             string                 `toml:",omitempty"`
 		RequiredBlocks          map[uint64]common.Hash `toml:"-"`
-		LightPeers              int                    `toml:"-"`
+		LightPeers              int                    `toml:",omitempty"`
 		SkipBcVersionCheck      bool                   `toml:"-"`
 		DatabaseHandles         int                    `toml:"-"`
 		DatabaseCache           int
@@ -111,7 +111,7 @@ func (c *Config) UnmarshalTOML(unmarshal func(interface{}) error) error {
 		StateHistory            *uint64                `toml:",omitempty"`
 		StateScheme             *string                `toml:",omitempty"`
 		RequiredBlocks          map[uint64]common.Hash `toml:"-"`
-		LightPeers              *int                   `toml:"-"`
+		LightPeers              *int                   `toml:",omitempty"`
 		SkipBcVersionCheck      *bool                  `toml:"-"`
 		DatabaseHandles         *int                   `toml:"-"`
 		DatabaseCache           *int