diff --git a/spring-web/src/main/java/org/springframework/web/server/adapter/WebHttpHandlerBuilder.java b/spring-web/src/main/java/org/springframework/web/server/adapter/WebHttpHandlerBuilder.java
index a8d0182a24..aa0b32eb7f 100644
--- a/spring-web/src/main/java/org/springframework/web/server/adapter/WebHttpHandlerBuilder.java
+++ b/spring-web/src/main/java/org/springframework/web/server/adapter/WebHttpHandlerBuilder.java
@@ -124,6 +124,7 @@ public final class WebHttpHandlerBuilder {
 		this.codecConfigurer = other.codecConfigurer;
 		this.localeContextResolver = other.localeContextResolver;
 		this.forwardedHeaderTransformer = other.forwardedHeaderTransformer;
+		this.httpHandlerDecorator = other.httpHandlerDecorator;
 	}
 
 
@@ -356,7 +357,7 @@ public final class WebHttpHandlerBuilder {
 	 * the entire chain and likewise the ability to observe the result of
 	 * the entire chain.
 	 * @param handlerDecorator the decorator to apply
-	 * @since 5.1
+	 * @since 5.3
 	 */
 	public WebHttpHandlerBuilder httpHandlerDecorator(Function<HttpHandler, HttpHandler> handlerDecorator) {
 		this.httpHandlerDecorator = (this.httpHandlerDecorator != null ?
@@ -365,10 +366,9 @@ public final class WebHttpHandlerBuilder {
 	}
 
 	/**
-	 * Whether a {@code ForwardedHeaderTransformer} is configured or not, either
-	 * detected from an {@code ApplicationContext} or explicitly configured via
-	 * {@link #forwardedHeaderTransformer(ForwardedHeaderTransformer)}.
-	 * @since 5.1
+	 * Whether a decorator for {@link HttpHandler} is configured or not via
+	 * {@link #httpHandlerDecorator(Function)}.
+	 * @since 5.3
 	 */
 	public boolean hasHttpHandlerDecorator() {
 		return (this.httpHandlerDecorator != null);
diff --git a/spring-web/src/test/java/org/springframework/web/server/adapter/WebHttpHandlerBuilderTests.java b/spring-web/src/test/java/org/springframework/web/server/adapter/WebHttpHandlerBuilderTests.java
index 1b5d938d0d..984f6e7b63 100644
--- a/spring-web/src/test/java/org/springframework/web/server/adapter/WebHttpHandlerBuilderTests.java
+++ b/spring-web/src/test/java/org/springframework/web/server/adapter/WebHttpHandlerBuilderTests.java
@@ -18,6 +18,7 @@ package org.springframework.web.server.adapter;
 
 import java.nio.charset.StandardCharsets;
 import java.util.Collections;
+import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.function.BiFunction;
 
 import org.junit.jupiter.api.Test;
@@ -122,15 +123,20 @@ public class WebHttpHandlerBuilderTests {
 		BiFunction<ServerHttpRequest, String, ServerHttpRequest> mutator =
 				(req, value) -> req.mutate().headers(headers -> headers.add("My-Header", value)).build();
 
-		WebHttpHandlerBuilder
+		AtomicBoolean success = new AtomicBoolean(false);
+		HttpHandler httpHandler = WebHttpHandlerBuilder
 				.webHandler(exchange -> {
 					HttpHeaders headers = exchange.getRequest().getHeaders();
-					assertThat(headers.getFirst("My-Header")).isEqualTo("1-2-3");
+					assertThat(headers.get("My-Header")).containsExactlyInAnyOrder("1", "2", "3");
+					success.set(true);
 					return Mono.empty();
 				})
 				.httpHandlerDecorator(handler -> (req, res) -> handler.handle(mutator.apply(req, "1"), res))
 				.httpHandlerDecorator(handler -> (req, res) -> handler.handle(mutator.apply(req, "2"), res))
-				.httpHandlerDecorator(handler -> (req, res) -> handler.handle(mutator.apply(req, "3"), res));
+				.httpHandlerDecorator(handler -> (req, res) -> handler.handle(mutator.apply(req, "3"), res)).build();
+
+		httpHandler.handle(MockServerHttpRequest.get("/").build(), new MockServerHttpResponse()).block();
+		assertThat(success.get()).isTrue();
 	}
 
 	private static Mono<Void> writeToResponse(ServerWebExchange exchange, String value) {