diff --git a/core/src/main/java/org/springframework/security/authorization/method/PostAuthorizeExpressionAttributeRegistry.java b/core/src/main/java/org/springframework/security/authorization/method/PostAuthorizeExpressionAttributeRegistry.java
index 05f17ee93d..2838d8ed0f 100644
--- a/core/src/main/java/org/springframework/security/authorization/method/PostAuthorizeExpressionAttributeRegistry.java
+++ b/core/src/main/java/org/springframework/security/authorization/method/PostAuthorizeExpressionAttributeRegistry.java
@@ -78,7 +78,7 @@ final class PostAuthorizeExpressionAttributeRegistry extends AbstractExpressionA
 
 	private PostAuthorize findPostAuthorizeAnnotation(Method method, Class<?> targetClass) {
 		Class<?> targetClassToUse = targetClass(method, targetClass);
-		return this.postAuthorizeSynthesizer.synthesize(method, targetClass);
+		return this.postAuthorizeSynthesizer.synthesize(method, targetClassToUse);
 	}
 
 	/**