diff --git a/src/actions.js b/src/actions.js
index 520d2df2f..51660effa 100644
--- a/src/actions.js
+++ b/src/actions.js
@@ -135,7 +135,7 @@ export const types = {
   NETWORKSETTINGS_UPDATE_INVALID: 'NETWORKSETTINGS_UPDATE_INVALID',
   /* It indicates the update request has failed. */
   NETWORKSETTINGS_UPDATE_FAILURE: 'NETWORK_SETTINGS_UPDATE_FAILURE',
-  /* It updates the redux state of network settings status */
+  /* It updates the redux state of network settings status. */
   NETWORKSETTINGS_UPDATE_READY: 'NETWORK_SETTINGS_UPDATE_READY',
 };
 
diff --git a/src/constants.js b/src/constants.js
index 810325331..f669d14d6 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -158,6 +158,7 @@ export const WALLET_SERVICE_FEATURE_TOGGLE = 'wallet-service-mobile.rollout';
 export const PUSH_NOTIFICATION_FEATURE_TOGGLE = 'push-notification.rollout';
 export const WALLET_CONNECT_FEATURE_TOGGLE = 'wallet-connect-mobile.rollout';
 export const NETWORK_SETTINGS_FEATURE_TOGGLE = 'network-settings.rollout';
+export const NANO_CONTRACT_FEATURE_TOGGLE = 'nano-contract.rollout';
 
 /**
  * Default feature toggle values.
@@ -172,6 +173,7 @@ export const FEATURE_TOGGLE_DEFAULTS = {
   [PUSH_NOTIFICATION_FEATURE_TOGGLE]: false,
   [WALLET_CONNECT_FEATURE_TOGGLE]: false,
   [NETWORK_SETTINGS_FEATURE_TOGGLE]: false,
+  [NANO_CONTRACT_FEATURE_TOGGLE]: false,
 };
 
 // Project id configured in https://walletconnect.com