diff --git a/java-workflows/grpc-google-cloud-workflows-v1/src/main/java/com/google/cloud/workflows/v1/WorkflowsGrpc.java b/java-workflows/grpc-google-cloud-workflows-v1/src/main/java/com/google/cloud/workflows/v1/WorkflowsGrpc.java
index 80743afd342f..84b65fcbc397 100644
--- a/java-workflows/grpc-google-cloud-workflows-v1/src/main/java/com/google/cloud/workflows/v1/WorkflowsGrpc.java
+++ b/java-workflows/grpc-google-cloud-workflows-v1/src/main/java/com/google/cloud/workflows/v1/WorkflowsGrpc.java
@@ -29,6 +29,7 @@
 @javax.annotation.Generated(
     value = "by gRPC proto compiler",
     comments = "Source: google/cloud/workflows/v1/workflows.proto")
+@io.grpc.stub.annotations.GrpcGenerated
 public final class WorkflowsGrpc {
 
   private WorkflowsGrpc() {}
diff --git a/java-workflows/grpc-google-cloud-workflows-v1beta/src/main/java/com/google/cloud/workflows/v1beta/WorkflowsGrpc.java b/java-workflows/grpc-google-cloud-workflows-v1beta/src/main/java/com/google/cloud/workflows/v1beta/WorkflowsGrpc.java
index ce09db2db4a8..d1977c879da5 100644
--- a/java-workflows/grpc-google-cloud-workflows-v1beta/src/main/java/com/google/cloud/workflows/v1beta/WorkflowsGrpc.java
+++ b/java-workflows/grpc-google-cloud-workflows-v1beta/src/main/java/com/google/cloud/workflows/v1beta/WorkflowsGrpc.java
@@ -29,6 +29,7 @@
 @javax.annotation.Generated(
     value = "by gRPC proto compiler",
     comments = "Source: google/cloud/workflows/v1beta/workflows.proto")
+@io.grpc.stub.annotations.GrpcGenerated
 public final class WorkflowsGrpc {
 
   private WorkflowsGrpc() {}