diff --git a/jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinBuilderService.kt b/jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinBuilderService.kt
index 2ad701e4433..1af1159709d 100644
--- a/jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinBuilderService.kt
+++ b/jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinBuilderService.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2015 JetBrains s.r.o.
+ * Copyright 2010-2021 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,19 +14,11 @@
  * limitations under the License.
  */
 
-package org.jetbrains.kotlin.jps.build;
+package org.jetbrains.kotlin.jps.build
 
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.jps.incremental.BuilderService;
-import org.jetbrains.jps.incremental.ModuleLevelBuilder;
+import org.jetbrains.jps.incremental.BuilderService
+import org.jetbrains.jps.incremental.ModuleLevelBuilder
 
-import java.util.Collections;
-import java.util.List;
-
-public class KotlinBuilderService extends BuilderService {
-    @NotNull
-    @Override
-    public List<? extends ModuleLevelBuilder> createModuleLevelBuilders() {
-        return Collections.singletonList(new KotlinBuilder());
-    }
+class KotlinBuilderService : BuilderService() {
+    override fun createModuleLevelBuilders(): List<ModuleLevelBuilder> = listOf(KotlinBuilder())
 }