diff --git a/weboob/capabilities/base.py b/weboob/capabilities/base.py
index c638170f..97769a6a 100644
--- a/weboob/capabilities/base.py
+++ b/weboob/capabilities/base.py
@@ -94,7 +94,7 @@ class CapBaseObject(object):
 
         if self.FIELDS is None:
             for key, value in iter_fields(self):
-                if key != 'backend':
+                if key not in ('backend','FIELDS'):
                     yield key, value
         else:
             yield 'id', self.id