diff --git a/crates/sui-protocol-config/src/lib.rs b/crates/sui-protocol-config/src/lib.rs
index b152c0e584bd6..fd9b4633102bb 100644
--- a/crates/sui-protocol-config/src/lib.rs
+++ b/crates/sui-protocol-config/src/lib.rs
@@ -152,6 +152,7 @@ const MAX_PROTOCOL_VERSION: u64 = 52;
 //             Modified sui-system package to enable withdrawal of stake before it becomes active.
 //             Enable soft bundle in devnet and testnet.
 //             Core macro visibility in sui core framework.
+//             Enable Mysticeti on mainnet.
 
 #[derive(Copy, Clone, Debug, Hash, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
 pub struct ProtocolVersion(u64);
@@ -2463,6 +2464,8 @@ impl ProtocolConfig {
                         cfg.feature_flags.per_object_congestion_control_mode =
                             PerObjectCongestionControlMode::TotalTxCount;
                     }
+
+                    cfg.feature_flags.consensus_choice = ConsensusChoice::Mysticeti;
                 }
                 // Use this template when making changes:
                 //
diff --git a/crates/sui-protocol-config/src/snapshots/sui_protocol_config__test__Mainnet_version_52.snap b/crates/sui-protocol-config/src/snapshots/sui_protocol_config__test__Mainnet_version_52.snap
index dac7ba081e3f3..88391b958cd8e 100644
--- a/crates/sui-protocol-config/src/snapshots/sui_protocol_config__test__Mainnet_version_52.snap
+++ b/crates/sui-protocol-config/src/snapshots/sui_protocol_config__test__Mainnet_version_52.snap
@@ -43,6 +43,7 @@ feature_flags:
   enable_coin_deny_list: true
   enable_group_ops_native_functions: true
   reject_mutable_random_on_entry_functions: true
+  consensus_choice: Mysticeti
   consensus_network: Tonic
   zklogin_max_epoch_upper_bound_delta: 30
   reshare_at_same_initial_version: true