diff --git a/.travis.yml b/.travis.yml
index 5190552..16d442a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -46,4 +46,4 @@ matrix:
 
 notifications:
   slack:
-    secure: MsPY8sUW5TVblcWc5NGkkWJlHxCMnhNa3IFPSVWthlk0fz+CLfOrLjQ+brQup/AJ7BRtyBKQ8udpqLj/R7CJKAiVVDAlUBcHqXk/WDusssGzJkDMrLVDefq++YCg5TdbcIaHt8WBVg6pD8H4kQJMJxmtcziQtiW1Qt0pwfuNJ+k=
+    secure: gpltVWntdKz0nSE6A5UvuX4qbN35uW51nsW+Ojgqm8Qsv8K240/NlZRYutFHr7GnJTe0rEEP2Oy3ZBnBtZKFn13RlTEAU/FCAxebr4H24rr29Ypwwp5xjiSE4MuoBEnroo4lw6ka3LsJnrY2PKRMiLJGsS0WsEPY4x8NUG/vyY8=
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 243733c..760d574 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## unreleased
+
+ * fix: permissible states not respecting guard parameters (see [issue #388](https://github.com/aasm/aasm/issues/388)) with [pull-request #389](https://github.com/aasm/aasm/pull/389)
+
 ## 4.11.0
 
  * support `logger` configuration (see [issue #370](https://github.com/aasm/aasm/pull/370) for details, thanks to [@HoyaBoya](https://github.com/HoyaBoya))
@@ -329,4 +333,3 @@
 
  * supporting i18n
  * supporting regular expressions for hash values and strings
-
diff --git a/README.md b/README.md
index b85e242..cb08fca 100644
--- a/README.md
+++ b/README.md
@@ -132,7 +132,7 @@ class Job
     ...
   end
 
-  def notify_somebody(user)
+  def notify_somebody
     ...
   end
 
@@ -418,6 +418,28 @@ SimpleMultipleExample.aasm(:work).states
 *Final note*: Support for multiple state machines per class is a pretty new feature
 (since version `4.3`), so please bear with us in case it doesn't work as expected.
 
+### Auto-generated Status Constants
+
+AASM automatically [generates constants](https://github.com/aasm/aasm/pull/60)
+for each status so you don't have to explicitly define them.
+
+```ruby
+class Foo
+  include AASM
+
+  aasm do
+    state :initialized
+    state :calculated
+    state :finalized
+  end
+end
+
+> Foo::STATE_INITIALIZED
+#=> :initialized
+> Foo::STATE_CALCULATED
+#=> :calculated
+```
+
 ### Extending AASM
 
 AASM allows you to easily extend `AASM::Base` for your own application purposes.
@@ -935,6 +957,9 @@ job.aasm.events(:reject => :sleep).map(&:name)
 # list states for select
 Job.aasm.states_for_select
 => [["Sleeping", "sleeping"], ["Running", "running"], ["Cleaning", "cleaning"]]
+
+# show permitted states with guard parameter
+job.aasm.states({:permitted => true}, guard_parameter).map(&:name)
 ```
 
 
@@ -1055,6 +1080,7 @@ Feel free to
 * [Scott Barron](https://github.com/rubyist) (2006–2009, original author)
 * [Travis Tilley](https://github.com/ttilley) (2009–2011)
 * [Thorsten Böttger](http://github.com/alto) (since 2011)
+* [Anil Maurya](http://github.com/anilmaurya) (since 2016)
 
 
 ## Contributing ##
diff --git a/aasm.gemspec b/aasm.gemspec
index 8dcb14f..5e49fc6 100644
--- a/aasm.gemspec
+++ b/aasm.gemspec
@@ -5,8 +5,8 @@ require "aasm/version"
 Gem::Specification.new do |s|
   s.name        = "aasm"
   s.version     = AASM::VERSION
-  s.authors     = ["Scott Barron", "Travis Tilley", "Thorsten Boettger"]
-  s.email       = %q{scott@elitists.net, ttilley@gmail.com, aasm@mt7.de}
+  s.authors     = ["Thorsten Boettger", "Anil Maurya"]
+  s.email       = %q{aasm@mt7.de, anilmaurya8dec@gmail.com}
   s.homepage    = %q{https://github.com/aasm/aasm}
   s.summary     = %q{State machine mixin for Ruby objects}
   s.description = %q{AASM is a continuation of the acts-as-state-machine rails plugin, built for plain Ruby objects.}
diff --git a/gemfiles/rails_4.0_mongo_mapper.gemfile b/gemfiles/rails_4.0_mongo_mapper.gemfile
index ab15ea2..707fd6b 100644
--- a/gemfiles/rails_4.0_mongo_mapper.gemfile
+++ b/gemfiles/rails_4.0_mongo_mapper.gemfile
@@ -1,7 +1,6 @@
 source "https://rubygems.org"
 
 gem "sqlite3",                          :platforms => :ruby
-gem "coveralls"
 gem 'rubysl',                           :platforms => :rbx
 gem 'rubinius-developer_tools',         :platforms => :rbx
 gem "jruby-openssl",                    :platforms => :jruby
diff --git a/gemfiles/rails_4.2_mongo_mapper.gemfile b/gemfiles/rails_4.2_mongo_mapper.gemfile
index 62a8550..c113b26 100644
--- a/gemfiles/rails_4.2_mongo_mapper.gemfile
+++ b/gemfiles/rails_4.2_mongo_mapper.gemfile
@@ -1,7 +1,6 @@
 source "https://rubygems.org"
 
 gem "sqlite3",                          :platforms => :ruby
-gem "coveralls"
 gem 'rubysl',                           :platforms => :rbx
 gem 'rubinius-developer_tools',         :platforms => :rbx
 gem "jruby-openssl",                    :platforms => :jruby
diff --git a/lib/aasm/instance_base.rb b/lib/aasm/instance_base.rb
index 63648fe..ec6b454 100644
--- a/lib/aasm/instance_base.rb
+++ b/lib/aasm/instance_base.rb
@@ -33,9 +33,9 @@ module AASM
       AASM::Localizer.new.human_state_name(@instance.class, state_object_for_name(current_state))
     end
 
-    def states(options={})
+    def states(options={}, *args)
       if options.has_key?(:permitted)
-        selected_events = events(:permitted => options[:permitted])
+        selected_events = events({:permitted => options[:permitted]}, *args)
         # An array of arrays. Each inner array represents the transitions that
         # transition from the current state for an event
         event_transitions = selected_events.map {|e| e.transitions_from_state(current_state) }
@@ -45,10 +45,10 @@ module AASM
           return nil if transitions.empty?
 
           # Return the :to state of the first transition that is allowed (or not) or nil
-          if options[:permitted] 
-            transition = transitions.find { |t| t.allowed?(@instance) }
+          if options[:permitted]
+            transition = transitions.find { |t| t.allowed?(@instance, *args) }
           else
-            transition = transitions.find { |t| !t.allowed?(@instance) }
+            transition = transitions.find { |t| !t.allowed?(@instance, *args) }
           end
           transition ? transition.to : nil
         end.flatten.compact.uniq
@@ -60,7 +60,7 @@ module AASM
       end
     end
 
-    def events(options={})
+    def events(options={}, *args)
       state = options[:state] || current_state
       events = @instance.class.aasm(@name).events.select {|e| e.transitions_from_state?(state) }
 
@@ -71,9 +71,9 @@ module AASM
         # filters the results of events_for_current_state so that only those that
         # are really currently possible (given transition guards) are shown.
         if options[:permitted]
-          events.select! { |e| @instance.send("may_#{e.name}?") }
+          events.select! { |e| @instance.send("may_#{e.name}?", *args) }
         else
-          events.select! { |e| !@instance.send("may_#{e.name}?") }
+          events.select! { |e| !@instance.send("may_#{e.name}?", *args) }
         end
       end
 
diff --git a/spec/models/guard_with_params.rb b/spec/models/guard_with_params.rb
new file mode 100644
index 0000000..a657bd4
--- /dev/null
+++ b/spec/models/guard_with_params.rb
@@ -0,0 +1,24 @@
+class GuardWithParams
+  include AASM
+  aasm do
+    state :new, :reviewed, :finalized
+
+    event :mark_as_reviewed do
+      transitions :from => :new, :to => :reviewed, :guards => [:user_is_manager?]
+    end
+  end
+
+  def user_is_manager?(user)
+    ok = false
+    if user.has_role? :manager
+      ok = true
+    end
+    return ok
+  end
+end
+
+class GuardParamsClass
+  def has_role?(role)
+    true
+  end
+end
diff --git a/spec/models/guard_with_params_multiple.rb b/spec/models/guard_with_params_multiple.rb
new file mode 100644
index 0000000..86532c0
--- /dev/null
+++ b/spec/models/guard_with_params_multiple.rb
@@ -0,0 +1,18 @@
+class GuardWithParamsMultiple
+  include AASM
+  aasm(:left) do
+    state :new, :reviewed, :finalized
+
+    event :mark_as_reviewed do
+      transitions :from => :new, :to => :reviewed, :guards => [:user_is_manager?]
+    end
+  end
+
+  def user_is_manager?(user)
+    ok = false
+    if user.has_role? :manager
+      ok = true
+    end
+    return ok
+  end
+end
diff --git a/spec/unit/guard_with_params_multiple_spec.rb b/spec/unit/guard_with_params_multiple_spec.rb
new file mode 100644
index 0000000..abb7302
--- /dev/null
+++ b/spec/unit/guard_with_params_multiple_spec.rb
@@ -0,0 +1,10 @@
+require 'spec_helper'
+
+describe "guards with params" do
+  let(:guard) { GuardWithParamsMultiple.new }
+  let(:user) {GuardParamsClass.new}
+
+  it "list permitted states" do
+    expect(guard.aasm(:left).states({:permitted => true}, user).map(&:name)).to eql [:reviewed]
+  end
+end
diff --git a/spec/unit/guard_with_params_spec.rb b/spec/unit/guard_with_params_spec.rb
new file mode 100644
index 0000000..a91b534
--- /dev/null
+++ b/spec/unit/guard_with_params_spec.rb
@@ -0,0 +1,10 @@
+require 'spec_helper'
+
+describe "guards with params" do
+  let(:guard) { GuardWithParams.new }
+  let(:user) {GuardParamsClass.new}
+
+  it "list permitted states" do
+    expect(guard.aasm.states({:permitted => true}, user).map(&:name)).to eql [:reviewed]
+  end
+end