diff --git a/packages/@glimmer/debug/lib/stack-check.ts b/packages/@glimmer/debug/lib/stack-check.ts
index f8abf5bbba..f030d9f373 100644
--- a/packages/@glimmer/debug/lib/stack-check.ts
+++ b/packages/@glimmer/debug/lib/stack-check.ts
@@ -16,20 +16,25 @@ export interface Checker<T> {
   expected(): string;
 }
 
-export function wrap<T>(checker: () => Checker<T>): Checker<T> {
-  class Wrapped {
-    declare type: T;
+class Wrapped<T> {
+  declare type: T;
+  #checker: Checker<T>;
 
-    validate(value: unknown): value is T {
-      return checker().validate(value);
-    }
+  constructor(checker: () => Checker<T>) {
+    this.#checker = checker();
+  }
 
-    expected(): string {
-      return checker().expected();
-    }
+  validate(value: unknown): value is T {
+    return this.#checker.validate(value);
   }
 
-  return new Wrapped();
+  expected(): string {
+    return this.#checker.expected();
+  }
+}
+
+export function wrap<T>(checker: () => Checker<T>): Checker<T> {
+  return new Wrapped(checker);
 }
 
 export interface Constructor<T> extends Function {