diff --git a/oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/ClientAuthorizationRequiredException.java b/oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/ClientAuthorizationRequiredException.java
index ca2f8258e7..9dca0aaf79 100644
--- a/oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/ClientAuthorizationRequiredException.java
+++ b/oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/ClientAuthorizationRequiredException.java
@@ -15,6 +15,8 @@
  */
 package org.springframework.security.oauth2.client;
 
+import org.springframework.security.oauth2.core.OAuth2AuthorizationException;
+import org.springframework.security.oauth2.core.OAuth2Error;
 import org.springframework.util.Assert;
 
 /**
@@ -25,7 +27,8 @@ import org.springframework.util.Assert;
  * @since 5.1
  * @see OAuth2AuthorizedClient
  */
-public class ClientAuthorizationRequiredException extends OAuth2ClientException {
+public class ClientAuthorizationRequiredException extends OAuth2AuthorizationException {
+	private static final String CLIENT_AUTHORIZATION_REQUIRED_ERROR_CODE = "client_authorization_required";
 	private final String clientRegistrationId;
 
 	/**
@@ -34,17 +37,8 @@ public class ClientAuthorizationRequiredException extends OAuth2ClientException
 	 * @param clientRegistrationId the identifier for the client's registration
 	 */
 	public ClientAuthorizationRequiredException(String clientRegistrationId) {
-		this(clientRegistrationId, "Authorization required for Client Registration Id: " + clientRegistrationId);
-	}
-
-	/**
-	 * Constructs a {@code ClientAuthorizationRequiredException} using the provided parameters.
-	 *
-	 * @param clientRegistrationId the identifier for the client's registration
-	 * @param message the detail message
-	 */
-	public ClientAuthorizationRequiredException(String clientRegistrationId, String message) {
-		super(message);
+		super(new OAuth2Error(CLIENT_AUTHORIZATION_REQUIRED_ERROR_CODE,
+				"Authorization required for Client Registration Id: " + clientRegistrationId, null));
 		Assert.hasText(clientRegistrationId, "clientRegistrationId cannot be empty");
 		this.clientRegistrationId = clientRegistrationId;
 	}
diff --git a/oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/OAuth2ClientException.java b/oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/OAuth2ClientException.java
deleted file mode 100644
index fef5e49e1c..0000000000
--- a/oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/OAuth2ClientException.java
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * Copyright 2002-2018 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.springframework.security.oauth2.client;
-
-/**
- * Base exception for OAuth 2.0 Client related errors.
- *
- * @author Joe Grandja
- * @since 5.1
- */
-public class OAuth2ClientException extends RuntimeException {
-
-	/**
-	 * Constructs an {@code OAuth2ClientException} using the provided parameters.
-	 *
-	 * @param message the detail message
-	 */
-	public OAuth2ClientException(String message) {
-		super(message);
-	}
-
-	/**
-	 * Constructs an {@code OAuth2ClientException} using the provided parameters.
-	 *
-	 * @param message the detail message
-	 * @param cause the root cause
-	 */
-	public OAuth2ClientException(String message, Throwable cause) {
-		super(message, cause);
-	}
-}