diff --git a/COPYRIGHT b/COPYRIGHT
index 72d08cbbc1..5450dd0d1d 100644
--- a/COPYRIGHT
+++ b/COPYRIGHT
@@ -6,6 +6,9 @@ as authorized by the OpenLDAP Public License.  A copy of this
 license is available at http://www.OpenLDAP.org/license.html or
 in file LICENSE in the top-level directory of the distribution.
 
+Individual files and/or contributed packages may be copyright by
+other parties and use subject to additional restrictions.
+
 This work is derived from the University of Michigan LDAP v3.3
 distribution.  Information concerning is available at
     http://www.umich.edu/~dirsvcs/ldap/ldap.html.