diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 3d2fbe94c19..1891eba1591 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -9630,6 +9630,7 @@ namespace ts {
                 case SyntaxKind.IntersectionType:
                 case SyntaxKind.IndexedAccessType:
                 case SyntaxKind.ConditionalType:
+                case SyntaxKind.TypeOperator:
                     return isAliasedType(parent);
                 case SyntaxKind.TypeAliasDeclaration:
                     return true;