diff --git a/pySim/cards.py b/pySim/cards.py
index b186044f..18e4ef30 100644
--- a/pySim/cards.py
+++ b/pySim/cards.py
@@ -348,6 +348,9 @@ class UsimCard(SimCard):
     def __init__(self, ssc):
         super(UsimCard, self).__init__(ssc)
 
+	# See also: ETSI TS 102 221, Table 9.3
+        self._adm_chv_num = 0xA0
+
     def read_ehplmn(self):
         (res, sw) = self._scc.read_binary(EF_USIM_ADF_map['EHPLMN'])
         if sw == '9000':