diff --git a/attributs.py b/attributs.py
index 1d194ea..02a5012 100644
--- a/attributs.py
+++ b/attributs.py
@@ -525,7 +525,7 @@ class aid(intAttr):
         self.value = int(aid)
 
 @crans_attribute
-class uid(Attr):
+class uid(rightProtectedAttr):
     __slots__ = ()
     singlevalue = True
     option = False
@@ -1491,7 +1491,7 @@ class homeDirectory(rightProtectedAttr):
     ldap_name = "homeDirectory"
 
 @crans_attribute
-class loginShell(Attr):
+class loginShell(rightProtectedAttr):
     __slots__ = ()
     singlevalue = True
     optional = True
@@ -1508,7 +1508,7 @@ class loginShell(Attr):
         self.value = shell
 
 @crans_attribute
-class uidNumber(intAttr):
+class uidNumber(intAttr, rightProtectedAttr):
     __slots__ = ()
     singlevalue = True
     optional = True
@@ -1519,7 +1519,7 @@ class uidNumber(intAttr):
     can_modify = [cableur, nounou]
 
 @crans_attribute
-class gidNumber(intAttr):
+class gidNumber(intAttr, rightProtectedAttr):
     __slots__ = ()
     singlevalue = True
     optional = True