diff --git a/src/composables/useCoreCommands.ts b/src/composables/useCoreCommands.ts
index 31051b239..4ae5b1392 100644
--- a/src/composables/useCoreCommands.ts
+++ b/src/composables/useCoreCommands.ts
@@ -718,9 +718,10 @@ export function useCoreCommands(): ComfyCommand[] {
       label: 'Custom Nodes Manager',
       versionAdded: '1.12.10',
       function: async () => {
-        const isLegacyManagerUI =
-          await useComfyManagerService().isLegacyManagerUI()
-        if (isLegacyManagerUI) {
+        const { is_legacy_manager_ui } =
+          (await useComfyManagerService().isLegacyManagerUI()) ?? {}
+
+        if (is_legacy_manager_ui === true) {
           try {
             await useCommandStore().execute(
               'Comfy.Manager.Menu.ToggleVisibility' // This command is registered by legacy manager FE extension
diff --git a/src/services/comfyManagerService.ts b/src/services/comfyManagerService.ts
index 0e8f245ac..79f2dd132 100644
--- a/src/services/comfyManagerService.ts
+++ b/src/services/comfyManagerService.ts
@@ -251,7 +251,7 @@ export const useComfyManagerService = () => {
   const isLegacyManagerUI = async (signal?: AbortSignal) => {
     const errorContext = 'Checking if user set Manager to use the legacy UI'
 
-    return executeRequest<boolean>(
+    return executeRequest<{ is_legacy_manager_ui: boolean }>(
       () => managerApiClient.get(ManagerRoute.IS_LEGACY_MANAGER_UI, { signal }),
       { errorContext }
     )