diff --git a/source4/setup/provision_init.ldif b/source4/setup/provision_init.ldif
index 334f7c3cca9..976645e0e73 100644
--- a/source4/setup/provision_init.ldif
+++ b/source4/setup/provision_init.ldif
@@ -7,6 +7,7 @@ dn: @INDEXLIST
 @IDXATTR: unixID
 @IDXATTR: unixName
 @IDXATTR: privilege
+@IDXATTR: nCName
 
 dn: @ATTRIBUTES
 userPrincipalName: CASE_INSENSITIVE