diff -r 3d68bb0047a1 -r ec403cf308eb master/pdo.c
--- a/master/pdo.c	Tue Feb 12 15:30:34 2013 +0100
+++ b/master/pdo.c	Tue Feb 12 15:46:43 2013 +0100
@@ -273,6 +273,8 @@
 /** Finds a PDO entry via its position in the list.
  *
  * Const version.
+ *
+ * \return Search result, or NULL.
  */
 const ec_pdo_entry_t *ec_pdo_find_entry_by_pos_const(
         const ec_pdo_t *pdo, /**< PDO. */