diff --git a/lib/index.js b/lib/index.js
index 6a90e8a..917ab13 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -80,4 +80,4 @@ var strftime = (function() {
 }());
 
 if (typeof exports !== 'undefined') exports.strftime = strftime;
-else (function(global) { global.strftime = strftime }.call(this));
+else (function(global) { global.strftime = strftime }(this));