diff --git a/src/services/classifier.ts b/src/services/classifier.ts
index d10f67e0e94..9211578341d 100644
--- a/src/services/classifier.ts
+++ b/src/services/classifier.ts
@@ -472,6 +472,9 @@ namespace ts {
             case SyntaxKind.ClassDeclaration:
             case SyntaxKind.InterfaceDeclaration:
             case SyntaxKind.FunctionDeclaration:
+            case SyntaxKind.ClassExpression:
+            case SyntaxKind.FunctionExpression:
+            case SyntaxKind.ArrowFunction:
                 cancellationToken.throwIfCancellationRequested();
         }
     }