diff --git a/lib/ace/keyboard/vim.js b/lib/ace/keyboard/vim.js
index 0ffd34e3..4ef12ca4 100644
--- a/lib/ace/keyboard/vim.js
+++ b/lib/ace/keyboard/vim.js
@@ -5979,7 +5979,7 @@ dom.importCssString(".normal-mode .ace_cursor{\
     },
     type: "boolean"
   }, false);
-  exports.Vim.defineEx('write', 'w', function() {
+  Vim.defineEx('write', 'w', function() {
     console.log(':write is not implemented')
   });
   defaultKeymap.push(