diff --git a/simplemenu.install b/simplemenu.install
new file mode 100644
index 00000000..0e4f1765
--- /dev/null
+++ b/simplemenu.install
@@ -0,0 +1,14 @@
+<?php
+// $Id$
+
+/**
+ * Implementation of hook_update_N().
+ */
+function simplemenu_update_6001() {
+  // if navigation menu was used in Drupal 5 use the same in Drupal 6.
+  // otherwise, we can't do anything.
+  if(variable_get('simplemenu_menu', 1) == 1) {
+    variable_set('simplemenu_menu', 'navigation:0');
+  }
+  return array();
+}
\ No newline at end of file