diff --git a/src/passes/generate-ts.js b/src/passes/generate-ts.js
index dafcfb3..39524ac 100644
--- a/src/passes/generate-ts.js
+++ b/src/passes/generate-ts.js
@@ -806,7 +806,7 @@ function generateTS(ast, options) {
       "  description: string;",
       "}",
       "",
-      "type Expectation = ILiteralExpectation | IClassExpectation | IAnyExpectation | IEndExpectation | IOtherExpectation;",
+      "export type Expectation = ILiteralExpectation | IClassExpectation | IAnyExpectation | IEndExpectation | IOtherExpectation;",
       "",
       "export class SyntaxError extends Error {",
       "  public static buildMessage(expected: Expectation[], found: string | null) {",