diff --git a/Resources/Public/Scripts/nwt.mailobfuscation.js b/Resources/Public/Scripts/nwt.mailobfuscation.js
index 82e1921..2c6e513 100644
--- a/Resources/Public/Scripts/nwt.mailobfuscation.js
+++ b/Resources/Public/Scripts/nwt.mailobfuscation.js
@@ -50,4 +50,6 @@ function linkTo_UnCryptMailto(s, offset) {
     location.href = 'mailto:' + decryptString(s, offset);
 }
 
-global.linkTo_UnCryptMailto = linkTo_UnCryptMailto;
\ No newline at end of file
+if (typeof global !== 'undefined') {
+    global.linkTo_UnCryptMailto = linkTo_UnCryptMailto;
+}
\ No newline at end of file