diff --git a/compiler/psi/src/org/jetbrains/kotlin/psi/KtTypeAlias.kt b/compiler/psi/src/org/jetbrains/kotlin/psi/KtTypeAlias.kt
index 4e521502ea6..e9471848e0c 100644
--- a/compiler/psi/src/org/jetbrains/kotlin/psi/KtTypeAlias.kt
+++ b/compiler/psi/src/org/jetbrains/kotlin/psi/KtTypeAlias.kt
@@ -33,7 +33,7 @@ class KtTypeAlias : KtTypeParameterListOwnerStub<KotlinTypeAliasStub>, KtNamedDe
         visitor.visitTypeAlias(this, data)
 
     fun isTopLevel(): Boolean =
-        stub?.isTopLevel() ?: parent is KtFile
+        stub?.isTopLevel() ?: (parent is KtFile)
 
     @IfNotParsed
     fun getTypeAliasKeyword(): PsiElement? =