diff --git a/ldapcherry/backend/__init__.py b/ldapcherry/backend/__init__.py
index 60d6fa9..1957589 100644
--- a/ldapcherry/backend/__init__.py
+++ b/ldapcherry/backend/__init__.py
@@ -43,7 +43,7 @@ class Backend:
     def get_param(self, param, default=None):
         if param in self.config:
             return self.config[param]
-        elif not default is None:
+        elif default is not None:
             return default
         else:
             raise MissingParameter('backends', self.backend_name + '.' + param)