diff --git a/lib/guard/notifier.rb b/lib/guard/notifier.rb
index f0258b8..ec7e54d 100644
--- a/lib/guard/notifier.rb
+++ b/lib/guard/notifier.rb
@@ -46,19 +46,19 @@ module Guard
     def self.notify_mac(title, message, image, options)
       require_growl # need for guard-rspec formatter that is called out of guard scope
       default_options = { :title => title, :icon => image_path(image), :name => "Guard" }
-      Growl.notify message, default_options.merge(options)
+      Growl.notify message, default_options.merge(options) if enabled?
     end
 
     def self.notify_linux(title, message, image, options)
       require_libnotify # need for guard-rspec formatter that is called out of guard scope
       default_options = { :body => message, :summary => title, :icon_path => image_path(image) }
-      Libnotify.show default_options.merge(options)
+      Libnotify.show default_options.merge(options) if enabled?
     end
 
     def self.notify_windows(title, message, image, options)
       require_rbnotifu # need for guard-rspec formatter that is called out of guard scope
       default_options = { :message => message, :title => title, :type => image_level(image), :time => 3 }
-      Notifu.show default_options.merge(options)
+      Notifu.show default_options.merge(options) if enabled?
     end
 
     def self.image_path(image)
diff --git a/spec/guard/notifier_spec.rb b/spec/guard/notifier_spec.rb
index bf69204..bb4ef18 100644
--- a/spec/guard/notifier_spec.rb
+++ b/spec/guard/notifier_spec.rb
@@ -107,6 +107,12 @@ describe Guard::Notifier do
         subject.notify 'great', :title => 'Guard'
       end
 
+      it "don't passes the notification to Growl if library is not available" do
+        Growl.should_not_receive(:notify)
+        subject.should_receive(:enabled?).and_return(true, false)
+        subject.notify 'great', :title => 'Guard'
+      end
+
       it "allows additional notification options" do
         Growl.should_receive(:notify).with("great",
           :title => "Guard",
@@ -148,6 +154,12 @@ describe Guard::Notifier do
         subject.notify 'great', :title => 'Guard'
       end
 
+      it "don't passes the notification to Libnotify if library is not available" do
+        Libnotify.should_not_receive(:show)
+        subject.should_receive(:enabled?).and_return(true, false)
+        subject.notify 'great', :title => 'Guard'
+      end
+
       it "allows additional notification options" do
         Libnotify.should_receive(:show).with(
           :body      => "great",
@@ -190,6 +202,12 @@ describe Guard::Notifier do
         subject.notify 'great', :title => 'Guard'
       end
 
+      it "don't passes the notification to rb-notifu if library is not available" do
+        Notifu.should_not_receive(:show)
+        subject.should_receive(:enabled?).and_return(true, false)
+        subject.notify 'great', :title => 'Guard'
+      end
+
       it "allows additional notification options" do
         Notifu.should_receive(:show).with(
           :message   => "great",