diff --git a/src/routes/notifications.js b/src/routes/notifications.js
index 957f46fa2..7f711f486 100644
--- a/src/routes/notifications.js
+++ b/src/routes/notifications.js
@@ -52,7 +52,7 @@ async function update(req, res, next) {
     assert.strictEqual(typeof req.notification, 'object');
     assert.strictEqual(typeof req.body, 'object');
 
-    if (typeof req.body.acknowledged !== 'boolean') return next(new HttpError(400, 'acknowledged must be a booliean'));
+    if (typeof req.body.acknowledged !== 'boolean') return next(new HttpError(400, 'acknowledged must be a boolean'));
 
     const [error] = await safe(notifications.update(req.notification, { acknowledged: req.body.acknowledged }));
     if (error) return next(BoxError.toHttpError(error));