diff --git a/eth/config.go b/eth/config.go
index 0a5fe000b..8ed014e24 100644
--- a/eth/config.go
+++ b/eth/config.go
@@ -158,4 +158,6 @@ type Config struct {
 
 	// CheckpointOracle is the configuration for checkpoint oracle.
 	CheckpointOracle *params.CheckpointOracleConfig `toml:",omitempty"`
+
+	StateDiff bool
 }