diff --git a/packages/core-app-api/src/app/AppManager.tsx b/packages/core-app-api/src/app/AppManager.tsx
index 70d7bc5434..8c2e09c903 100644
--- a/packages/core-app-api/src/app/AppManager.tsx
+++ b/packages/core-app-api/src/app/AppManager.tsx
@@ -311,11 +311,10 @@ export class AppManager implements BackstageApp {
           // Go through the featureFlags returned from the traversal and
           // register those now the configApi has been loaded
           const registeredFlags = featureFlagsApi.getRegisteredFlags();
+          const flagNames = new Set(registeredFlags.map(f => f.name));
           for (const name of featureFlags) {
             // Prevents adding duplicate feature flags
-            if (!registeredFlags.some((featureFlag) => {
-              return featureFlag.name === name
-            })) {
+            if (!flagNames.has(name)) {
               featureFlagsApi.registerFlag({ name, pluginId: '' });
             }
           }