Index: src/wp-admin/includes/class-wp-terms-list-table.php
===================================================================
--- src/wp-admin/includes/class-wp-terms-list-table.php	(revision 40566)
+++ src/wp-admin/includes/class-wp-terms-list-table.php	(working copy)
@@ -501,7 +501,11 @@
 	 * @return string
 	 */
 	public function column_description( $tag ) {
-		return $tag->description;
+   if ( ! empty( $tag->description ) ) {
+     return $tag->description;
+   } else {
+     return _x('No description');
+   }
 	}
 
 	/**