diff --git a/core/lib/config/src/configs/chain.rs b/core/lib/config/src/configs/chain.rs
index 7a0504503c1..67a6843b466 100644
--- a/core/lib/config/src/configs/chain.rs
+++ b/core/lib/config/src/configs/chain.rs
@@ -123,7 +123,7 @@ pub struct StateKeeperConfig {
 
     /// Number of keys that is processed by enum_index migration in State Keeper each L1 batch.
     pub enum_index_migration_chunk_size: Option<usize>,
-
+    #[serde(default)]
     pub l1_batch_commit_data_generator_mode: L1BatchCommitDataGeneratorMode,
 }
 
diff --git a/core/lib/env_config/src/chain.rs b/core/lib/env_config/src/chain.rs
index 37ffe46a332..2a599a5a178 100644
--- a/core/lib/env_config/src/chain.rs
+++ b/core/lib/env_config/src/chain.rs
@@ -205,4 +205,12 @@ mod tests {
         let actual = CircuitBreakerConfig::from_env().unwrap();
         assert_eq!(actual, expected_circuit_breaker_config());
     }
+
+    #[test]
+    fn default_state_keeper_mode() {
+        assert_eq!(
+            StateKeeperConfig::default().l1_batch_commit_data_generator_mode,
+            L1BatchCommitDataGeneratorMode::Rollup
+        );
+    }
 }