diff --git a/index.js b/index.js
index 066a6ec..f6e5c31 100644
--- a/index.js
+++ b/index.js
@@ -1,5 +1,5 @@
 "use strict";
 
-module.exports = function propagateAbort(source, reason) {
+module.exports = function propagateAbort(reason, source) {
 	return source.abort(reason);
-};
\ No newline at end of file
+};