diff --git a/tailbone/forms/renderers/__init__.py b/tailbone/forms/renderers/__init__.py
index 5fc0aec9..c361b681 100644
--- a/tailbone/forms/renderers/__init__.py
+++ b/tailbone/forms/renderers/__init__.py
@@ -24,7 +24,7 @@
 FormAlchemy Field Renderers
 """
 
-from .core import DateFieldRenderer
+from .core import CustomFieldRenderer, DateFieldRenderer
 
 from .common import (AutocompleteFieldRenderer,
                      DecimalFieldRenderer, CurrencyFieldRenderer,
diff --git a/tailbone/forms/renderers/core.py b/tailbone/forms/renderers/core.py
index 528eaf4d..e68d4777 100644
--- a/tailbone/forms/renderers/core.py
+++ b/tailbone/forms/renderers/core.py
@@ -44,8 +44,7 @@ class CustomFieldRenderer(formalchemy.FieldRenderer):
         if len(args) == 1 and isinstance(args[0], AbstractField):
             super(CustomFieldRenderer, self).__init__(args[0])
         else:
-            if args:
-                self.request = args[0]
+            assert len(args) == 0
             self.init(**kwargs)
 
     def __call__(self, field):