diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/npm/NpmProjectVisitor.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/npm/NpmProjectVisitor.kt
index c5dfe5ca3ed..cb52b31e345 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/npm/NpmProjectVisitor.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/npm/NpmProjectVisitor.kt
@@ -83,8 +83,10 @@ internal class NpmProjectVisitor(val resolver: NpmResolver, val project: Project
     private fun visitTarget(target: KotlinTarget) {
         if (target.platformType == KotlinPlatformType.js) {
             target.compilations.toList().forEach { compilation ->
-                compilation as KotlinJsCompilation
-                visitCompilation(compilation)
+                if (compilation is KotlinJsCompilation) {
+                    // compilation may be KotlinWithJavaTarget for old Kotlin2JsPlugin
+                    visitCompilation(compilation)
+                }
             }
         }
     }