diff --git a/kibot/fil_base.py b/kibot/fil_base.py
index 61e62569..e5e07d24 100644
--- a/kibot/fil_base.py
+++ b/kibot/fil_base.py
@@ -233,11 +233,11 @@ def __init__(self):
         self._is_transform = False
         with document:
             self.name = ''
-            """ Used to identify this particular filter definition """
+            """ *Used to identify this particular filter definition """
             self.type = ''
             """ Type of filter """
             self.comment = ''
-            """ A comment for documentation purposes """
+            """ *A comment for documentation purposes """
 
     def config(self, parent):
         super().config(parent)