diff --git a/lib/declarative_authorization/authorization.rb b/lib/declarative_authorization/authorization.rb
index f27f9d9d..43a02cee 100644
--- a/lib/declarative_authorization/authorization.rb
+++ b/lib/declarative_authorization/authorization.rb
@@ -82,7 +82,7 @@ def initialize (reader = nil)
     end
 
     def initialize_copy (from) # :nodoc:
-      [ :reader ].each {|attr| instance_variable_set(:"@#{attr}", from.send(attr).clone) }
+      @reader = from.reader.clone
     end
 
     # {[priv, ctx] => [priv, ...]}
@@ -349,9 +349,12 @@ def initialize (rules = [])
       @rules = rules.clone
       reset!
     end
-    def initialize_copy source
-      initialize @rules.collect {|rule| rule.clone}
+
+    def initialize_copy (source)
+      @rules = @rules.collect {|rule| rule.clone}
+      reset!
     end
+
     def matching(roles, privileges, context)
       roles = [roles] unless roles.is_a?(Array)
       rules = cached_auth_rules[context] || []
diff --git a/lib/declarative_authorization/reader.rb b/lib/declarative_authorization/reader.rb
index 3c0d3a4f..cc04a303 100644
--- a/lib/declarative_authorization/reader.rb
+++ b/lib/declarative_authorization/reader.rb
@@ -59,6 +59,11 @@ def initialize ()
         @auth_rules_reader = AuthorizationRulesReader.new
       end
 
+      def initialize_copy (from) # :nodoc:
+        @privileges_reader = from.privileges_reader.clone
+        @auth_rules_reader = from.auth_rules_reader.clone
+      end
+
       # ensures you get back a DSLReader
       # if you provide a:
       #   DSLReader - you will get it back.
@@ -141,6 +146,11 @@ def initialize # :nodoc:
         @privilege_hierarchy = {}
       end
 
+      def initialize_copy (from) # :nodoc:
+        @privileges = from.privileges.clone
+        @privilege_hierarchy = from.privilege_hierarchy.clone
+      end
+
       def append_privilege (priv) # :nodoc:
         @privileges << priv unless @privileges.include?(priv)
       end
@@ -193,6 +203,13 @@ def initialize # :nodoc:
         @auth_rules = AuthorizationRuleSet.new
       end
 
+      def initialize_copy (from) # :nodoc:
+        [:roles, :role_hierarchy, :auth_rules,
+            :role_descriptions, :role_titles, :omnipotent_roles].each do |attribute|
+          instance_variable_set(:"@#{attribute}", from.send(attribute).clone)
+        end
+      end
+
       def append_role (role, options = {}) # :nodoc:
         @roles << role unless @roles.include? role
         @role_titles[role] = options[:title] if options[:title]