diff --git a/virtualsmartcard/src/vpicc/virtualsmartcard/utils.py b/virtualsmartcard/src/vpicc/virtualsmartcard/utils.py
index 2d22dab..63bcf5d 100644
--- a/virtualsmartcard/src/vpicc/virtualsmartcard/utils.py
+++ b/virtualsmartcard/src/vpicc/virtualsmartcard/utils.py
@@ -271,8 +271,8 @@ class C_APDU(APDU):
                     self.Le = (apdu[-2]<<8) + apdu[-1]
                     self.data = apdu[7:-3]
                 else:
-                    raise ValueError("Invalid Lc value. Is %s, should be %s or %s" % (self.Lc,)
-                        7 + self.Lc, 7 + self.Lc + 3)
+                    raise ValueError("Invalid Lc value. Is %s, should be %s or %s"
+                            % ( self.Lc, 7 + self.Lc, 7 + self.Lc + 3))
         else:                                           # short apdu
             if len(apdu) == 5:                          # case 2 short apdu
                 self.Le = apdu[-1]