diff --git a/packages/parser/src/models/v2/extensions.ts b/packages/parser/src/models/v2/extensions.ts
index e529b35d3..063f06768 100644
--- a/packages/parser/src/models/v2/extensions.ts
+++ b/packages/parser/src/models/v2/extensions.ts
@@ -5,7 +5,7 @@ import type { ExtensionInterface } from '../extension';
 
 export class Extensions extends Collection<ExtensionInterface> implements ExtensionsInterface {
   override get<T = any>(id: string): ExtensionInterface<T> | undefined {
-    id = id.startsWith('x-') ? id : `x-${id}`;
-    return this.collections.find(ext => ext.id() === id);
+    const extId = id.startsWith('x-') ? id : `x-${id}`;
+    return this.collections.find(ext => ext.id() === extId);
   }
 }