diff --git a/src/main/java/io/vertx/core/loadbalancing/LoadBalancer.java b/src/main/java/io/vertx/core/loadbalancing/LoadBalancer.java
index ef7db797627..4d93ddb1304 100644
--- a/src/main/java/io/vertx/core/loadbalancing/LoadBalancer.java
+++ b/src/main/java/io/vertx/core/loadbalancing/LoadBalancer.java
@@ -32,12 +32,9 @@ public interface LoadBalancer {
    */
   LoadBalancer ROUND_ROBIN = () -> {
     AtomicInteger idx = new AtomicInteger();
-    return new EndpointSelector() {
-      @Override
-      public int selectEndpoint(List<EndpointMetrics<?>> endpoints) {
-        int next = idx.getAndIncrement();
-        return next % endpoints.size();
-      }
+    return (EndpointSelector) endpoints -> {
+      int next = idx.getAndIncrement();
+      return next % endpoints.size();
     };
   };