diff --git a/config/src/main/java/org/springframework/security/config/annotation/web/configurers/AuthorizeHttpRequestsConfigurer.java b/config/src/main/java/org/springframework/security/config/annotation/web/configurers/AuthorizeHttpRequestsConfigurer.java
index 1de4750a494..0d8ee818d7d 100644
--- a/config/src/main/java/org/springframework/security/config/annotation/web/configurers/AuthorizeHttpRequestsConfigurer.java
+++ b/config/src/main/java/org/springframework/security/config/annotation/web/configurers/AuthorizeHttpRequestsConfigurer.java
@@ -171,7 +171,8 @@ private AuthorizationManager<HttpServletRequest> createAuthorizationManager() {
 			Assert.state(this.mappingCount > 0,
 					"At least one mapping is required (for example, authorizeHttpRequests().anyRequest().authenticated())");
 			ObservationRegistry registry = getObservationRegistry();
-			RequestMatcherDelegatingAuthorizationManager manager = postProcess(this.managerBuilder.build());
+			AuthorizationManager<HttpServletRequest> manager = postProcess(
+					(AuthorizationManager<HttpServletRequest>) this.managerBuilder.build());
 			if (registry.isNoop()) {
 				return manager;
 			}
diff --git a/config/src/test/java/org/springframework/security/config/annotation/web/configurers/AuthorizeHttpRequestsConfigurerTests.java b/config/src/test/java/org/springframework/security/config/annotation/web/configurers/AuthorizeHttpRequestsConfigurerTests.java
index c2d99042b02..d380703bcdd 100644
--- a/config/src/test/java/org/springframework/security/config/annotation/web/configurers/AuthorizeHttpRequestsConfigurerTests.java
+++ b/config/src/test/java/org/springframework/security/config/annotation/web/configurers/AuthorizeHttpRequestsConfigurerTests.java
@@ -153,6 +153,7 @@ public void configureWhenObjectPostProcessorRegisteredThenInvokedOnAuthorization
 		this.spring.register(ObjectPostProcessorConfig.class).autowire();
 		ObjectPostProcessor objectPostProcessor = this.spring.getContext().getBean(ObjectPostProcessor.class);
 		verify(objectPostProcessor).postProcess(any(RequestMatcherDelegatingAuthorizationManager.class));
+		verify(objectPostProcessor).postProcess(any(AuthorizationManager.class));
 		verify(objectPostProcessor).postProcess(any(AuthorizationFilter.class));
 	}