Index: twitter/twitter.module
===================================================================
--- twitter/twitter.module	(revision 593)
+++ twitter/twitter.module	(working copy)
@@ -140,6 +140,24 @@
 }
 
 /**
+ * hook_content_extra_fields implementation
+ */
+function twitter_content_extra_fields($type_name) {
+  $type = node_get_types('type', $type_name);
+  $twitter_types = variable_get('twitter_types', array());
+  $extra = array();
+
+  if (!empty($twitter_types[$type_name])) {
+    $extra['twitter'] = array(
+      'label' => 'Twitter',
+      'description' => t('Twitter module form.'),
+      'weight' => 0
+    );
+  }
+  return $extra;
+}
+
+/**
  * Very lightweight helper function to generate a TinyURL for a given post.
  */
 function twitter_shorten_url($url) {