diff --git a/idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceTypeAlias/ui/KotlinIntroduceTypeAliasDialog.java b/idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceTypeAlias/ui/KotlinIntroduceTypeAliasDialog.java
index 6cd80654c25..96dbf5b278c 100644
--- a/idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceTypeAlias/ui/KotlinIntroduceTypeAliasDialog.java
+++ b/idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceTypeAlias/ui/KotlinIntroduceTypeAliasDialog.java
@@ -21,6 +21,7 @@ import com.intellij.openapi.ui.DialogWrapper;
 import com.intellij.psi.PsiElement;
 import com.intellij.refactoring.ui.NameSuggestionsField;
 import com.intellij.ui.TitledSeparator;
+import com.intellij.util.ArrayUtil;
 import com.intellij.util.containers.MultiMap;
 import kotlin.Unit;
 import kotlin.jvm.functions.Function0;