diff --git a/src/lib/types/experimental.ts b/src/lib/types/experimental.ts
index ef02b72bc5a7..defd86a4a630 100644
--- a/src/lib/types/experimental.ts
+++ b/src/lib/types/experimental.ts
@@ -62,7 +62,8 @@ export type IFlagKey =
     | 'unleashAI'
     | 'webhookDomainLogging'
     | 'addonUsageMetrics'
-    | 'releasePlans';
+    | 'releasePlans'
+    | 'navigationSidebar';
 
 export type IFlags = Partial<{ [key in IFlagKey]: boolean | Variant }>;
 
@@ -311,6 +312,10 @@ const flags: IFlags = {
         process.env.UNLEASH_EXPERIMENTAL_RELEASE_PLANS,
         false,
     ),
+    navigationSidebar: parseEnvVarBoolean(
+        process.env.UNLEASH_EXPERIMENTAL_SIDEBAR_NAVIGATION,
+        true,
+    ),
 };
 
 export const defaultExperimentalOptions: IExperimentalOptions = {