diff --git a/spring-context/src/main/java/org/springframework/context/support/PostProcessorRegistrationDelegate.java b/spring-context/src/main/java/org/springframework/context/support/PostProcessorRegistrationDelegate.java
index 8b9658f53e..d959e8de3c 100644
--- a/spring-context/src/main/java/org/springframework/context/support/PostProcessorRegistrationDelegate.java
+++ b/spring-context/src/main/java/org/springframework/context/support/PostProcessorRegistrationDelegate.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -44,6 +44,7 @@ import org.springframework.lang.Nullable;
  * Delegate for AbstractApplicationContext's post-processor handling.
  *
  * @author Juergen Hoeller
+ * @author Sam Brannen
  * @since 4.0
  */
 final class PostProcessorRegistrationDelegate {
@@ -255,6 +256,10 @@ final class PostProcessorRegistrationDelegate {
 	}
 
 	private static void sortPostProcessors(List<?> postProcessors, ConfigurableListableBeanFactory beanFactory) {
+		// Nothing to sort?
+		if (postProcessors.size() <= 1) {
+			return;
+		}
 		Comparator<Object> comparatorToUse = null;
 		if (beanFactory instanceof DefaultListableBeanFactory) {
 			comparatorToUse = ((DefaultListableBeanFactory) beanFactory).getDependencyComparator();