diff --git a/ghost/admin/app/controllers/settings/theme/uploadtheme.js b/ghost/admin/app/controllers/settings/theme/uploadtheme.js
index 80385f8861..abbc395017 100644
--- a/ghost/admin/app/controllers/settings/theme/uploadtheme.js
+++ b/ghost/admin/app/controllers/settings/theme/uploadtheme.js
@@ -5,6 +5,6 @@ export default class UploadThemeController extends Controller {
     @service config;
 
     get isAllowed() {
-        return (!this.config.get('hostSettings')?.limits?.customThemes) || this.config.get('hostSettings').limits.customThemes.disabled;
+        return (!this.config.get('hostSettings')?.limits?.customThemes) || !this.config.get('hostSettings').limits.customThemes.disabled;
     }
 }