diff --git a/secop/properties.py b/secop/properties.py
index edfd5b0..4111b53 100644
--- a/secop/properties.py
+++ b/secop/properties.py
@@ -179,7 +179,7 @@ class HasProperties(HasDescriptors):
             if po.mandatory:
                 try:
                     self.propertyValues[pn] = po.datatype(self.propertyValues[pn])
-                except (KeyError, BadValueError) as e:
+                except (KeyError, BadValueError):
                     name = getattr(self, 'name', self.__class__.__name__)
                     raise ConfigError('%s.%s needs a value of type %r!' % (name, pn, po.datatype))
         for pn, po in self.propertyDict.items():