diff --git a/aio/content/examples/form-validation/src/app/shared/forbidden-name.directive.ts b/aio/content/examples/form-validation/src/app/shared/forbidden-name.directive.ts
index 0c4f8b18c0..60510fe6c6 100644
--- a/aio/content/examples/form-validation/src/app/shared/forbidden-name.directive.ts
+++ b/aio/content/examples/form-validation/src/app/shared/forbidden-name.directive.ts
@@ -1,6 +1,6 @@
 // #docregion
-import { Directive, Input, OnChanges, SimpleChanges } from '@angular/core';
-import { AbstractControl, NG_VALIDATORS, Validator, ValidatorFn, Validators } from '@angular/forms';
+import { Directive, Input } from '@angular/core';
+import { AbstractControl, NG_VALIDATORS, ValidationErrors, Validator, ValidatorFn } from '@angular/forms';
 
 // #docregion custom-validator
 /** A hero's name can't match the given regular expression */
@@ -22,7 +22,7 @@ export function forbiddenNameValidator(nameRe: RegExp): ValidatorFn {
 export class ForbiddenValidatorDirective implements Validator {
   @Input('appForbiddenName') forbiddenName: string;
 
-  validate(control: AbstractControl): {[key: string]: any} | null {
+  validate(control: AbstractControl): ValidationErrors | null {
     return this.forbiddenName ? forbiddenNameValidator(new RegExp(this.forbiddenName, 'i'))(control)
                               : null;
   }
diff --git a/aio/content/guide/attribute-binding.md b/aio/content/guide/attribute-binding.md
index d051319b5e..81597a9fea 100644
--- a/aio/content/guide/attribute-binding.md
+++ b/aio/content/guide/attribute-binding.md
@@ -150,7 +150,7 @@ The following table summarizes class binding syntax.
     <td><code>"my-class-1 my-class-2 my-class-3"</code></td>
   </tr>
   <tr>
-    <td><code>{[key: string]: boolean | undefined | null}</code></td>
+    <td><code>Record&lt;string, boolean | undefined | null&gt;</code></td>
     <td><code>{foo: true, bar: false}</code></td>
   </tr>
   <tr>
@@ -248,7 +248,7 @@ The following table summarizes style binding syntax.
     <td><code>"width: 100px; height: 100px"</code></td>
   </tr>
   <tr>
-    <td><code>{[key: string]: string | undefined | null}</code></td>
+    <td><code>Record&lt;string, string | undefined | null&gt;</code></td>
     <td><code>{width: '100px', height: '100px'}</code></td>
   </tr>
 </table>
@@ -362,4 +362,4 @@ Another example is the [RouterOutlet](api/router/RouterOutlet) directive, which
 
   Remember, use [@Input()](api/core/Input) when you want to keep track of the attribute value and update the associated property. Use [@Attribute()](api/core/Attribute) when you want to inject the value of an HTML attribute to a component or directive constructor.
 
-</div>
\ No newline at end of file
+</div>