diff --git a/validation/public_api.ts b/validation/public_api.ts
index 4cd6893c..a076537a 100644
--- a/validation/public_api.ts
+++ b/validation/public_api.ts
@@ -16,5 +16,5 @@ export { minLength, MinLengthValidationError } from './src/min-length';
 export { notEqualTo, NotEqualToValidationError } from './src/not-equal-to';
 export { pattern, PatternValidationError } from './src/pattern';
 export { required, RequiredValidationError } from './src/required';
-export { requiredFalse, RequiredFalseValidationError } from './src/required-false';
-export { requiredTrue, RequiredTrueValidationError } from './src/required-true';
+export { requiredFalse } from './src/required-false';
+export { requiredTrue } from './src/required-true';
diff --git a/validation/src/required-false.ts b/validation/src/required-false.ts
index 26c0f132..30f19801 100644
--- a/validation/src/required-false.ts
+++ b/validation/src/required-false.ts
@@ -1,16 +1,5 @@
 import { ValidationErrors } from 'ngrx-forms';
 
-export interface RequiredFalseValidationError {
-  actual: boolean;
-}
-
-// @ts-ignore
-declare module 'ngrx-forms/src/state' {
-  export interface ValidationErrors {
-    required?: RequiredFalseValidationError;
-  }
-}
-
 /**
  * A validation function that requires the value to be `false`. Considers `null` and
  * `undefined` as valid. Combine this function with the `required` validation
diff --git a/validation/src/required-true.ts b/validation/src/required-true.ts
index b7b2fe8a..a92a5e4b 100644
--- a/validation/src/required-true.ts
+++ b/validation/src/required-true.ts
@@ -1,16 +1,5 @@
 import { ValidationErrors } from 'ngrx-forms';
 
-export interface RequiredTrueValidationError {
-  actual: boolean;
-}
-
-// @ts-ignore
-declare module 'ngrx-forms/src/state' {
-  export interface ValidationErrors {
-    required?: RequiredTrueValidationError;
-  }
-}
-
 /**
  * A validation function that requires the value to be `true`. Considers `null` and
  * `undefined` as valid. Combine this function with the `required` validation