diff --git a/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/main/java/io/quarkus/resteasy/reactive/server/deployment/ResteasyReactiveProcessor.java b/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/main/java/io/quarkus/resteasy/reactive/server/deployment/ResteasyReactiveProcessor.java
index 439bceb1405ff..49df7d6a09d64 100644
--- a/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/main/java/io/quarkus/resteasy/reactive/server/deployment/ResteasyReactiveProcessor.java
+++ b/extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/main/java/io/quarkus/resteasy/reactive/server/deployment/ResteasyReactiveProcessor.java
@@ -5,6 +5,7 @@
 import static io.quarkus.resteasy.reactive.common.deployment.QuarkusResteasyReactiveDotNames.ROUTING_CONTEXT;
 import static java.util.stream.Collectors.toList;
 import static org.jboss.resteasy.reactive.common.processor.ResteasyReactiveDotNames.DATE_FORMAT;
+import static org.jboss.resteasy.reactive.common.processor.ResteasyReactiveDotNames.LEGACY_PUBLISHER;
 import static org.jboss.resteasy.reactive.common.processor.ResteasyReactiveDotNames.MULTI;
 import static org.jboss.resteasy.reactive.common.processor.ResteasyReactiveDotNames.PUBLISHER;
 import static org.jboss.resteasy.reactive.common.processor.ResteasyReactiveDotNames.REST_MULTI;
@@ -556,6 +557,7 @@ public void accept(EndpointIndexer.ResourceMethodCallbackEntry entry) {
                                     MULTI.toString().equals(entry.getResourceMethod().getSimpleReturnType()) ||
                                     REST_MULTI.toString().equals(entry.getResourceMethod().getSimpleReturnType()) ||
                                     PUBLISHER.toString().equals(entry.getResourceMethod().getSimpleReturnType()) ||
+                                    LEGACY_PUBLISHER.toString().equals(entry.getResourceMethod().getSimpleReturnType()) ||
                                     filtersAccessResourceMethod(resourceInterceptorsBuildItem.getResourceInterceptors()) ||
                                     entry.additionalRegisterClassForReflectionCheck()) {
                                 minimallyRegisterResourceClassForReflection(entry, reflectiveClassBuildItemBuildProducer);