diff --git a/mithril.js b/mithril.js
index 9a3c9cba..6fbf4ff8 100644
--- a/mithril.js
+++ b/mithril.js
@@ -296,7 +296,8 @@ var _8 = function($window, Promise) {
 						}
 						else {
 							var error = new Error(xhr.responseText)
-							for (var key in response) error[key] = response[key]
+							error.code = xhr.status
+							error.response = response
 							reject(error)
 						}
 					}
diff --git a/mithril.min.js b/mithril.min.js
index 18a2e091..c9fd686f 100644
--- a/mithril.min.js
+++ b/mithril.min.js
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