diff --git a/packages/casl-ability/src/ForbiddenError.ts b/packages/casl-ability/src/ForbiddenError.ts
index ff455503d..6eeb8eef0 100644
--- a/packages/casl-ability/src/ForbiddenError.ts
+++ b/packages/casl-ability/src/ForbiddenError.ts
@@ -30,7 +30,7 @@ export class ForbiddenError<T extends AnyAbility> extends NativeError {
     return new this<U>(ability);
   }
 
-  private constructor(ability: T) {
+  constructor(ability: T) {
     super('');
     this.ability = ability;