diff --git a/src/appstore.js b/src/appstore.js
index 35067c3d2..55851158e 100644
--- a/src/appstore.js
+++ b/src/appstore.js
@@ -490,7 +490,7 @@ async function downloadIcon(appStoreId, version) {
             .timeout(60 * 1000)
             .ok(() => true));
 
-        if (networkError) throw new BoxError(BoxError.NETWORK_ERROR, `Network error downloading icon : ${networkError.message}`);
+        if (networkError) throw new BoxError(BoxError.NETWORK_ERROR, Object.assign(networkError, { message: 'Downloading icon' }));
         if (response.status !== 200) return; // ignore error. this can also happen for apps installed with cloudron-cli
 
         const contentType = response.headers['content-type'];
diff --git a/src/boxerror.js b/src/boxerror.js
index ac5d29f03..1767689ec 100644
--- a/src/boxerror.js
+++ b/src/boxerror.js
@@ -11,7 +11,7 @@ exports = module.exports = BoxError;
 function BoxError(reason, errorOrMessage, extra) {
     assert.strictEqual(typeof reason, 'string');
     assert(errorOrMessage instanceof Error || typeof errorOrMessage === 'string');
-    assert(typeof override === 'object' || typeof override === 'undefined');
+    assert(typeof extra === 'object' || typeof extra === 'undefined');
 
     Error.call(this);
     Error.captureStackTrace(this, this.constructor);