diff --git a/Tools/press/press.j b/Tools/press/press.j
index 22d84f3be..4862f0d46 100644
--- a/Tools/press/press.j
+++ b/Tools/press/press.j
@@ -32,7 +32,7 @@ function main()
         {
             case "--main":
                 if (args.length)
-                    mainFile = args.shift();
+                    mainFilename = args.shift();
                 else
                     usageError = true;
                 break;