diff --git a/java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/LanguageLevelCombo.kt b/java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/LanguageLevelCombo.kt
index 61992f6194ee..6f6be7196113 100644
--- a/java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/LanguageLevelCombo.kt
+++ b/java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/LanguageLevelCombo.kt
@@ -17,14 +17,12 @@ import org.jetbrains.annotations.Nls
 import org.jetbrains.annotations.NonNls
 import javax.swing.DefaultComboBoxModel
 
-abstract class LanguageLevelCombo(
+abstract class LanguageLevelCombo @JvmOverloads constructor(
   defaultItem: @Nls String?,
   // It could be an open method but since we use it in constructor we have a leaking this problem
-  levelFilter: (LanguageLevel) -> Boolean
+  levelFilter: (LanguageLevel) -> Boolean = {true}
 ) : ComboBox<Any>() {
 
-  constructor(defaultItem: @Nls String?): this(defaultItem, {true})
-
   init {
     val items = mutableListOf<Any>()
     items.add(defaultItem ?: "")