diff --git a/virtualsmartcard/src/vpicc/virtualsmartcard/CryptoUtils.py b/virtualsmartcard/src/vpicc/virtualsmartcard/CryptoUtils.py
index 4f4d8b4..88c3742 100644
--- a/virtualsmartcard/src/vpicc/virtualsmartcard/CryptoUtils.py
+++ b/virtualsmartcard/src/vpicc/virtualsmartcard/CryptoUtils.py
@@ -124,7 +124,7 @@ def crypto_checksum(algo, key, data, iv=None, ssc=None):
         raise ValueError, "Unknown Algorithm %s" % algo
     
     if algo == "MAC":
-        checksum = calculate_MAC(key, data, 0x00, iv) #FIXME: IV?
+        checksum = calculate_MAC(key, data, iv)
     elif algo == "HMAC":
         hmac = HMAC.new(key, data)
         checksum = hmac.hexdigest()
diff --git a/virtualsmartcard/src/vpicc/virtualsmartcard/TLVutils.py b/virtualsmartcard/src/vpicc/virtualsmartcard/TLVutils.py
index 054bd57..3604e1c 100644
--- a/virtualsmartcard/src/vpicc/virtualsmartcard/TLVutils.py
+++ b/virtualsmartcard/src/vpicc/virtualsmartcard/TLVutils.py
@@ -16,6 +16,9 @@
 # You should have received a copy of the GNU General Public License along with
 # virtualsmartcard.  If not, see <http://www.gnu.org/licenses/>.
 #
+
+from vsmartcard.utils import stringtoint
+
 TAG = {}
 TAG["FILECONTROLPARAMETERS"]    = 0x62
 TAG["FILEMANAGEMENTDATA"]       = 0x64