pyderasn.py | 9 +++++----

diff --git a/pyderasn.py b/pyderasn.py
index e7b60452521382d5f8c4a6cae2d02b715c636f48706a1c2bd73da7eddb5fca6e..00de8739193fa7a0f58a82017781b79d1bb28a545f10762b28b2a84c39335e59 100755
--- a/pyderasn.py
+++ b/pyderasn.py
@@ -13,8 +13,7 @@ # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU Lesser General Public License for more details.
 #
 # You should have received a copy of the GNU Lesser General Public
-# License along with this program.  If not, see
-# <http://www.gnu.org/licenses/>.
+# License along with this program.  If not, see <http://www.gnu.org/licenses/>.
 """Python ASN.1 DER/BER codec with abstract structures
 
 This library allows you to marshal various structures in ASN.1 DER
@@ -347,6 +346,8 @@ DEFINED BY some previously met ObjectIdentifier. This library provides
 ability to specify mapping between some OID and field that must be
 decoded with specific specification.
 
+.. _defines:
+
 defines kwarg
 _____________
 
@@ -420,8 +421,8 @@     (decode_path, defines)
 
 where ``decode_path`` is a tuple holding so-called decode path to the
 exact :py:class:`pyderasn.ObjectIdentifier` field you want to apply
-``defines``, holding exactly the same value as accepted in its keyword
-argument.
+``defines``, holding exactly the same value as accepted in its
+:ref:`keyword argument <defines>`.
 
 For example, again for CMS, you want to automatically decode
 ``SignedData`` and CMC's (:rfc:`5272`) ``PKIData`` and ``PKIResponse``