diff --git a/mithril.js b/mithril.js
index eba9b40c..e9592f99 100644
--- a/mithril.js
+++ b/mithril.js
@@ -866,7 +866,7 @@ var m = (function app(window, undefined) {
 		prop.then = function(resolve, reject) {
 			return propify(promise.then(resolve, reject), initialValue);
 		};
-		prop.catch = prop.then.bind(null, null);
+		prop["catch"] = prop.then.bind(null, null);
 		return prop;
 	}
 	//Promiz.mithril.js | Zolmeister | MIT