diff --git a/weboob/capabilities/base.py b/weboob/capabilities/base.py
index 76676c46..2f4c2477 100644
--- a/weboob/capabilities/base.py
+++ b/weboob/capabilities/base.py
@@ -111,6 +111,9 @@ class NotAvailableType(object):
     def __deepcopy__(self, memo):
         return self
 
+    def __repr__(self):
+        return 'NotAvailable'
+
     def __unicode__(self):
         return u'Not available'
 
@@ -137,6 +140,9 @@ class NotLoadedType(object):
     def __deepcopy__(self, memo):
         return self
 
+    def __repr__(self):
+        return u'NotLoaded'
+
     def __unicode__(self):
         return u'Not loaded'
 
diff --git a/weboob/tools/browser2/filters/standard.py b/weboob/tools/browser2/filters/standard.py
index c532e6c3..1261c52f 100644
--- a/weboob/tools/browser2/filters/standard.py
+++ b/weboob/tools/browser2/filters/standard.py
@@ -30,7 +30,11 @@ from weboob.tools.compat import basestring
 from weboob.tools.exceptions import ParseError
 from weboob.tools.html import html2text
 
-_NO_DEFAULT = object()
+class NoDefault(object):
+    def __repr__(self):
+        return 'NO_DEFAULT'
+
+_NO_DEFAULT = NoDefault()
 
 
 __all__ = ['FilterError', 'ColumnNotFound', 'RegexpError', 'ItemNotFound',