Index: wp-admin/import/wordpress.php
===================================================================
--- wp-admin/import/wordpress.php	(revision 3772)
+++ wp-admin/import/wordpress.php	(working copy)
@@ -220,8 +220,8 @@
 				$postdata = compact('post_author', 'post_date', 'post_date_gmt', 'post_content', 'post_title', 'post_excerpt', 'post_status', 'comment_status', 'ping_status', 'post_modified', 'post_modified_gmt', 'guid', 'post_parent', 'post_type');
 				$comment_post_ID = $post_id = wp_insert_post($postdata);
 				// Add categories.
-				if (0 != count($post_categories)) {
-					wp_create_categories($post_categories, $post_id);
+				if (0 != count($categories)) {
+					wp_create_categories($categories, $post_id);
 				}
 			}
 
@@ -308,4 +308,4 @@
 
 register_importer('wordpress', 'WordPress', __('Import posts from a WordPress export file'), array ($wp_import, 'dispatch'));
 
-?>
\ No newline at end of file
+?>