diff --git a/temporal-spring-boot-autoconfigure/src/main/java/io/temporal/spring/boot/autoconfigure/template/WorkersTemplate.java b/temporal-spring-boot-autoconfigure/src/main/java/io/temporal/spring/boot/autoconfigure/template/WorkersTemplate.java
index 870ede282..0f4809aed 100644
--- a/temporal-spring-boot-autoconfigure/src/main/java/io/temporal/spring/boot/autoconfigure/template/WorkersTemplate.java
+++ b/temporal-spring-boot-autoconfigure/src/main/java/io/temporal/spring/boot/autoconfigure/template/WorkersTemplate.java
@@ -393,11 +393,8 @@ private void createWorkerFromAnExplicitConfig(
                 AopUtils.getTargetClass(bean),
                 taskQueue);
             worker.registerNexusServiceImplementation(bean);
-            addRegisteredNexusServiceImpl(
-                worker,
-                beanName,
-                bean.getClass().getName(),
-                ServiceImplInstance.fromInstance(AopUtils.getTargetClass(bean)).getDefinition());
+            ServiceDefinition definition = ServiceImplInstance.fromInstance(bean).getDefinition();
+            addRegisteredNexusServiceImpl(worker, beanName, bean.getClass().getName(), definition);
           });
     }
   }
diff --git a/temporal-spring-boot-autoconfigure/src/test/resources/application.yml b/temporal-spring-boot-autoconfigure/src/test/resources/application.yml
index fd1f25257..bf0260fed 100644
--- a/temporal-spring-boot-autoconfigure/src/test/resources/application.yml
+++ b/temporal-spring-boot-autoconfigure/src/test/resources/application.yml
@@ -101,6 +101,8 @@ spring:
           - io.temporal.spring.boot.autoconfigure.bytaskqueue.TestWorkflowImpl
         activity-beans:
           - TestActivityImpl
+        nexus-service-beans:
+          - TestNexusServiceImpl
 
 ---
 spring: