diff --git a/ldap/authentic.schema b/ldap/authentic.schema
index 13db788..fc56603 100644
--- a/ldap/authentic.schema
+++ b/ldap/authentic.schema
@@ -15,6 +15,7 @@ objectIdentifier AuthenticLdapObjectClass    AuthenticLdap:3
 attributeType (AuthenticLdapAttributes:1
   NAME 'activationKey'
   DESC 'user activation key'
+  EQUALITY caseExactIA5Match
   SYNTAX 1.3.6.1.4.1.1466.115.121.1.26
   SINGLE-VALUE )