diff --git a/samples/grpc-oauth2/build.gradle b/samples/grpc-oauth2/build.gradle
index 02eda0c..5ede0d3 100644
--- a/samples/grpc-oauth2/build.gradle
+++ b/samples/grpc-oauth2/build.gradle
@@ -42,19 +42,20 @@ tasks.named('test') {
 }
 
 protobuf {
-    protoc {
-        artifact = "com.google.protobuf:protoc:${dependencyManagement.importedProperties['protobuf-java.version']}"
-    }
-    plugins {
-        grpc {
-            artifact = "io.grpc:protoc-gen-grpc-java:${dependencyManagement.importedProperties['grpc.version']}"
-        }
-    }
-    generateProtoTasks {
-        all()*.plugins {
-            grpc {
+	protoc {
+		artifact = "com.google.protobuf:protoc:${dependencyManagement.importedProperties['protobuf-java.version']}"
+	}
+	plugins {
+		grpc {
+			artifact = "io.grpc:protoc-gen-grpc-java:${dependencyManagement.importedProperties['grpc.version']}"
+		}
+	}
+	generateProtoTasks {
+		all()*.plugins {
+			grpc {
 				option 'jakarta_omit'
+				option '@generated=omit'
 			}
 		}
-    }
+	}
 }
diff --git a/samples/grpc-secure/build.gradle b/samples/grpc-secure/build.gradle
index 02eda0c..5ede0d3 100644
--- a/samples/grpc-secure/build.gradle
+++ b/samples/grpc-secure/build.gradle
@@ -42,19 +42,20 @@ tasks.named('test') {
 }
 
 protobuf {
-    protoc {
-        artifact = "com.google.protobuf:protoc:${dependencyManagement.importedProperties['protobuf-java.version']}"
-    }
-    plugins {
-        grpc {
-            artifact = "io.grpc:protoc-gen-grpc-java:${dependencyManagement.importedProperties['grpc.version']}"
-        }
-    }
-    generateProtoTasks {
-        all()*.plugins {
-            grpc {
+	protoc {
+		artifact = "com.google.protobuf:protoc:${dependencyManagement.importedProperties['protobuf-java.version']}"
+	}
+	plugins {
+		grpc {
+			artifact = "io.grpc:protoc-gen-grpc-java:${dependencyManagement.importedProperties['grpc.version']}"
+		}
+	}
+	generateProtoTasks {
+		all()*.plugins {
+			grpc {
 				option 'jakarta_omit'
+				option '@generated=omit'
 			}
 		}
-    }
+	}
 }