diff --git a/lib/net/ldap/entry.rb b/lib/net/ldap/entry.rb
index 616ffe7f..6a157615 100644
--- a/lib/net/ldap/entry.rb
+++ b/lib/net/ldap/entry.rb
@@ -147,7 +147,7 @@ def to_ldif
     Net::LDAP::Dataset.from_entry(self).to_ldif_string
   end
 
-  def respond_to?(sym) #:nodoc:
+  def respond_to?(sym, include_all = false) #:nodoc:
     return true if valid_attribute?(self.class.attribute_name(sym))
     return super
   end