diff --git a/admin_interface.gemspec b/admin_interface.gemspec
index cab87c7..1a7a861 100644
--- a/admin_interface.gemspec
+++ b/admin_interface.gemspec
@@ -5,7 +5,7 @@
 
 Gem::Specification.new do |s|
   s.name = "admin_interface"
-  s.version = "2.1.13"
+  s.version = "2.1.14"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.authors = ["Joost Hietbrink"]
@@ -125,6 +125,7 @@ Gem::Specification.new do |s|
     "vendor/assets/images/admin/files/xml.png",
     "vendor/assets/images/admin/files/zip.png",
     "vendor/assets/images/admin/flag_black.png",
+    "vendor/assets/images/admin/flag_green.png",
     "vendor/assets/images/admin/flag_red.png",
     "vendor/assets/images/admin/folder.png",
     "vendor/assets/images/admin/folder_open.png",
@@ -255,6 +256,8 @@ Gem::Specification.new do |s|
       s.add_development_dependency(%q<geminabox>, [">= 0"])
       s.add_development_dependency(%q<jeweler>, [">= 0"])
       s.add_development_dependency(%q<geminabox>, [">= 0"])
+      s.add_development_dependency(%q<jeweler>, [">= 0"])
+      s.add_development_dependency(%q<geminabox>, [">= 0"])
       s.add_runtime_dependency(%q<kaminari>, [">= 0.12.4"])
       s.add_runtime_dependency(%q<ransack>, [">= 0"])
       s.add_runtime_dependency(%q<inherited_resources>, [">= 1.2.2"])
@@ -303,6 +306,8 @@ Gem::Specification.new do |s|
       s.add_dependency(%q<geminabox>, [">= 0"])
       s.add_dependency(%q<jeweler>, [">= 0"])
       s.add_dependency(%q<geminabox>, [">= 0"])
+      s.add_dependency(%q<jeweler>, [">= 0"])
+      s.add_dependency(%q<geminabox>, [">= 0"])
       s.add_dependency(%q<kaminari>, [">= 0.12.4"])
       s.add_dependency(%q<ransack>, [">= 0"])
       s.add_dependency(%q<inherited_resources>, [">= 1.2.2"])
@@ -352,6 +357,8 @@ Gem::Specification.new do |s|
     s.add_dependency(%q<geminabox>, [">= 0"])
     s.add_dependency(%q<jeweler>, [">= 0"])
     s.add_dependency(%q<geminabox>, [">= 0"])
+    s.add_dependency(%q<jeweler>, [">= 0"])
+    s.add_dependency(%q<geminabox>, [">= 0"])
     s.add_dependency(%q<kaminari>, [">= 0.12.4"])
     s.add_dependency(%q<ransack>, [">= 0"])
     s.add_dependency(%q<inherited_resources>, [">= 1.2.2"])
diff --git a/app/helpers/admin/base_helper.rb b/app/helpers/admin/base_helper.rb
index 7523cac..fefd660 100644
--- a/app/helpers/admin/base_helper.rb
+++ b/app/helpers/admin/base_helper.rb
@@ -32,8 +32,9 @@ def true_false_image(boolean)
   end
 
   def true_false_flag_class(boolean)
+    return 'icon-flag_black' if boolean.nil?
     raise ArgumentError, "Expected a Boolean as argument!" unless boolean.is_a?(FalseClass) || boolean.is_a?(TrueClass)
-    boolean ? 'icon-flag_red' : 'icon-flag_black'
+    boolean ? 'icon-flag_green' : 'icon-flag_red'
   end
 
   # Overwrites l helper.
diff --git a/lib/admin_interface/version.rb b/lib/admin_interface/version.rb
index 167052c..2277527 100644
--- a/lib/admin_interface/version.rb
+++ b/lib/admin_interface/version.rb
@@ -3,7 +3,7 @@ module AdminInterface
   module Version
     MAJOR = 2
     MINOR = 1
-    PATCH = 13
+    PATCH = 14
     BUILD = nil
 
     STRING = [MAJOR, MINOR, PATCH, BUILD].compact.join('.')
diff --git a/vendor/assets/images/admin/flag_green.png b/vendor/assets/images/admin/flag_green.png
new file mode 100644
index 0000000..c8c61b0
Binary files /dev/null and b/vendor/assets/images/admin/flag_green.png differ
diff --git a/vendor/assets/stylesheets/admin_interface.css.scss b/vendor/assets/stylesheets/admin_interface.css.scss
index b308383..71dd6e3 100644
--- a/vendor/assets/stylesheets/admin_interface.css.scss
+++ b/vendor/assets/stylesheets/admin_interface.css.scss
@@ -29,6 +29,7 @@ div.input {
 .icon-crop  { background-image: image-url('admin/crop.png'); }
 .icon-mail  { background-image: image-url('admin/mail.png'); }
 .icon-flag_red  { background-image: image-url('admin/flag_red.png'); }
+.icon-flag_green  { background-image: image-url('admin/flag_green.png'); }
 .icon-flag_black  { background-image: image-url('admin/flag_black.png'); }
 
 tfoot th {