diff --git a/spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/ErrorsMethodArgumentResolver.java b/spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/ErrorsMethodArgumentResolver.java
index fe534a4c6c..9cd88c005a 100644
--- a/spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/ErrorsMethodArgumentResolver.java
+++ b/spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/ErrorsMethodArgumentResolver.java
@@ -90,8 +90,10 @@ public class ErrorsMethodArgumentResolver extends HandlerMethodArgumentResolverS
 
 		Object errors = context.getModel().asMap().get(BindingResult.MODEL_KEY_PREFIX + name);
 
-		Assert.notNull(errors, "An Errors/BindingResult argument is expected to be declared " +
-				"immediately after the @ModelAttribute argument to which it applies: " +
+		Assert.notNull(errors, "An Errors/BindingResult argument is expected " +
+				"immediately after the @ModelAttribute argument to which it applies. " +
+				"For @RequestBody and @RequestPart arguments, please declare them with a reactive type wrapper " +
+				"and use its onError operators to handle WebExchangeBindException: " +
 				parameter.getMethod());
 
 		return errors;
diff --git a/spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/ErrorsMethodArgumentResolverTests.java b/spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/ErrorsMethodArgumentResolverTests.java
index 0e5050a022..88bb9fb072 100644
--- a/spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/ErrorsMethodArgumentResolverTests.java
+++ b/spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/ErrorsMethodArgumentResolverTests.java
@@ -123,7 +123,7 @@ public class ErrorsMethodArgumentResolverTests {
 	public void resolveWithBindingResultNotFound() throws Exception {
 
 		this.expectedException.expectMessage("An Errors/BindingResult argument is expected " +
-				"to be declared immediately after the @ModelAttribute argument");
+				"immediately after the @ModelAttribute argument");
 
 		MethodParameter parameter = this.testMethod.arg(Errors.class);
 		this.resolver.resolveArgument(parameter, this.bindingContext, this.exchange)