diff --git a/encryptor.js b/encryptor.js
index ab867d5..e68dc05 100644
--- a/encryptor.js
+++ b/encryptor.js
@@ -12,13 +12,13 @@ function main(args) {
         return 0;
     }
 
+    var filename = args[0];
     var dstfile = filename + ".enc";
     if (FILE.fileExists(dstfile)) {
         console.error(dstfile, "already exists. Please delete it.");
         return 0;
     }
 
-    var filename = args[0];
     var userKey = '';
     while (userKey.length == 0 || userKey.length > 16) {
         userKey = Toolkit.prompt("Please enter the password for encryption:");