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 b1b42956438..0748dae74d4 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
@@ -449,7 +449,7 @@ open class Kotlin2JsCompile() : AbstractKotlinCompile<K2JSCompilerArguments>(),
                 .filter { LibraryUtils.isKotlinJavascriptLibrary(it) }
                 .map { it.canonicalPath }
 
-        args.libraries = (dependencies + listOfNotNull(friendDependency)).let {
+        args.libraries = (dependencies + listOfNotNull(friendDependency)).distinct().let {
             if (it.isNotEmpty())
                 it.joinToString(File.pathSeparator) else
                 null