diff --git a/lib/net/ldap/connection.rb b/lib/net/ldap/connection.rb
index 61aacb53..1ad67501 100644
--- a/lib/net/ldap/connection.rb
+++ b/lib/net/ldap/connection.rb
@@ -523,6 +523,7 @@ def search(args = nil)
     :add => 0,
     :delete => 1,
     :replace => 2,
+    :increment => 3, # OpenLDAP extension 
   }
 
   def self.modify_ops(operations)