diff --git a/src/typescript-ast-nodes.js b/src/typescript-ast-nodes.js
index caf446c0a..55eeca52f 100644
--- a/src/typescript-ast-nodes.js
+++ b/src/typescript-ast-nodes.js
@@ -123,7 +123,10 @@ module.exports = function(fork) {
     .field("typeAnnotation", def("TypeAnnotation"))
     .bases("TSSignature");
 
-  def("TSAsExpression").bases("Expression");
+  def("TSAsExpression")
+    .build("expression")
+    .field("expression", def("Node"))
+    .bases("Expression");
 
   def("TSNamespaceExportDeclaration")
     .bases("Declaration")
diff --git a/tests/typescript_comments/__snapshots__/jsfmt.spec.js.snap b/tests/typescript_comments/__snapshots__/jsfmt.spec.js.snap
new file mode 100644
index 000000000..128bce0f8
--- /dev/null
+++ b/tests/typescript_comments/__snapshots__/jsfmt.spec.js.snap
@@ -0,0 +1,12 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`types.ts 1`] = `
+(() => {
+  // swallow error and fallback to using directory as path
+}) as string[];
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+(() => {
+  // swallow error and fallback to using directory as path
+}) as string[];
+
+`;
diff --git a/tests/typescript_comments/jsfmt.spec.js b/tests/typescript_comments/jsfmt.spec.js
new file mode 100644
index 000000000..bc085c48c
--- /dev/null
+++ b/tests/typescript_comments/jsfmt.spec.js
@@ -0,0 +1 @@
+run_spec(__dirname, { parser: "typescript" });
diff --git a/tests/typescript_comments/types.ts b/tests/typescript_comments/types.ts
new file mode 100644
index 000000000..8e277783b
--- /dev/null
+++ b/tests/typescript_comments/types.ts
@@ -0,0 +1,3 @@
+(() => {
+  // swallow error and fallback to using directory as path
+}) as string[];