diff --git a/rcljava/src/main/java/org/ros2/rcljava/service/ServiceImpl.java b/rcljava/src/main/java/org/ros2/rcljava/service/ServiceImpl.java
index e45d06ec..8d7a3254 100644
--- a/rcljava/src/main/java/org/ros2/rcljava/service/ServiceImpl.java
+++ b/rcljava/src/main/java/org/ros2/rcljava/service/ServiceImpl.java
@@ -100,9 +100,7 @@ public final long getHandle() {
 
   public void executeCallback(
       RMWRequestId rmwRequestId, MessageDefinition request, MessageDefinition response) {
-    TriConsumer<RMWRequestId, MessageDefinition, MessageDefinition> callback =
-        ((ServiceImpl) this).callback;
-
+    TriConsumer callback = this.callback;
     callback.accept(rmwRequestId, request, response);
   }