diff --git a/spring-integration-core/src/main/java/org/springframework/integration/config/IntegrationRegistrar.java b/spring-integration-core/src/main/java/org/springframework/integration/config/IntegrationRegistrar.java
index 4006b5c7dc..d790b6773d 100644
--- a/spring-integration-core/src/main/java/org/springframework/integration/config/IntegrationRegistrar.java
+++ b/spring-integration-core/src/main/java/org/springframework/integration/config/IntegrationRegistrar.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2021 the original author or authors.
+ * Copyright 2014-2022 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.
@@ -56,6 +56,9 @@ public class IntegrationRegistrar implements ImportBeanDefinitionRegistrar {
 	public void registerBeanDefinitions(@Nullable AnnotationMetadata importingClassMetadata,
 			BeanDefinitionRegistry registry) {
 
+		// Ensure that ClassUtils is initialized with a proper Spring application context ClassLoader.
+		org.springframework.integration.util.ClassUtils.resolvePrimitiveType(Integer.class);
+
 		registerDefaultConfiguringBeanFactoryPostProcessor(registry);
 		registerIntegrationConfigurationBeanFactoryPostProcessor(registry);
 		if (importingClassMetadata != null) {