diff --git a/packages/type/src/serializer.ts b/packages/type/src/serializer.ts
index 14d57f156..442d85660 100644
--- a/packages/type/src/serializer.ts
+++ b/packages/type/src/serializer.ts
@@ -2153,7 +2153,7 @@ export class Serializer {
 
         this.typeGuards.getRegistry(1).registerClass(Set, typeGuardClassSet);
         this.typeGuards.getRegistry(1).registerClass(Map, typeGuardClassMap);
-        this.typeGuards.getRegistry(1).registerClass(Date, (type, state) => state.addSetterAndReportErrorIfInvalid('type', 'No a Date', `${state.accessor} instanceof Date`));
+        this.typeGuards.getRegistry(1).registerClass(Date, (type, state) => state.addSetterAndReportErrorIfInvalid('type', 'Not a Date', `${state.accessor} instanceof Date`));
         this.typeGuards.getRegistry(0.5).registerClass(Date, (type, state) => {
             state.addSetter(`'string' === typeof ${state.accessor} && new Date(${state.accessor}).toString() !== 'Invalid Date'`);
         });
diff --git a/packages/type/tests/validation.spec.ts b/packages/type/tests/validation.spec.ts
index 8e977f933..abff7a545 100644
--- a/packages/type/tests/validation.spec.ts
+++ b/packages/type/tests/validation.spec.ts
@@ -296,5 +296,5 @@ test('date', () => {
         public name!: string;
         public createdAt!: Date;
     }
-    expect(validate<Account>({name: "jack", createdAt: 'asd'})).toEqual([{code: 'type', message: 'No a Date', path: 'createdAt'}]);
+    expect(validate<Account>({name: "jack", createdAt: 'asd'})).toEqual([{code: 'type', message: 'Not a Date', path: 'createdAt'}]);
 });