diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/SourceRoots.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/SourceRoots.kt
index bb91c9c045c..aceab1a1a47 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/SourceRoots.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/SourceRoots.kt
@@ -51,9 +51,9 @@ internal sealed class SourceRoots(val kotlinSourceFiles: List<File>) {
         }
     }
 
-    class ForJs(kotlinSourceFiles: List<File>) : SourceRoots(kotlinSourceFiles) {
+    class KotlinOnly(kotlinSourceFiles: List<File>) : SourceRoots(kotlinSourceFiles) {
         companion object {
-            fun create(taskSource: FileTree) = ForJs((taskSource as Iterable<File>).filter(File::isKotlinFile))
+            fun create(taskSource: FileTree) = KotlinOnly((taskSource as Iterable<File>).filter(File::isKotlinFile))
         }
     }
 }
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/Tasks.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/Tasks.kt
index 8492d5c3d7a..98cf563794a 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/Tasks.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/Tasks.kt
@@ -337,10 +337,10 @@ open class Kotlin2JsCompile() : AbstractKotlinCompile<K2JSCompilerArguments>(),
         return args
     }
 
-    override fun getSourceRoots() = SourceRoots.ForJs.create(getSource())
+    override fun getSourceRoots() = SourceRoots.KotlinOnly.create(getSource())
 
     override fun callCompiler(args: K2JSCompilerArguments, sourceRoots: SourceRoots, changedFiles: ChangedFiles) {
-        sourceRoots as SourceRoots.ForJs
+        sourceRoots as SourceRoots.KotlinOnly
 
         logger.debug("Calling compiler")
         destinationDir.mkdirs()