diff --git a/VERSION b/VERSION
index 1892b92..88c5fb8 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.3.2
+1.4.0
diff --git a/lib/gelf/logger.rb b/lib/gelf/logger.rb
index 719a14f..14e8665 100644
--- a/lib/gelf/logger.rb
+++ b/lib/gelf/logger.rb
@@ -23,8 +23,20 @@ def add(level, *args)
                             [args[0], default_options['facility']]
                           end
 
-      hash = {'short_message' => message, 'facility' => progname}
+      if message.is_a?(Hash)
+        # Stringify keys.
+        hash = {}
+        message.each do |k,v|
+          hash[k.to_s] = message[k]
+        end
+
+        hash['facility'] = progname
+      else
+        hash = {'short_message' => message, 'facility' => progname}
+      end
+
       hash.merge!(self.class.extract_hash_from_exception(message)) if message.is_a?(Exception)
+
       notify_with_level(level, hash)
     end
 
@@ -55,4 +67,5 @@ class Logger < Notifier
     include LoggerCompatibility
     @last_chunk_id = 0
   end
+
 end
diff --git a/test/test_logger.rb b/test/test_logger.rb
index 2125da9..c6d2782 100644
--- a/test/test_logger.rb
+++ b/test/test_logger.rb
@@ -97,6 +97,43 @@ class TestLogger < Test::Unit::TestCase
         end
         @logger.add(GELF::INFO, 'Facility') { RuntimeError.new('Boom!') }
       end
+
+
+  #####################
+
+      # logger.add(Logger::INFO, { :short_message => "Some message" })
+      should "implement add method with level and message from hash, facility from defaults" do
+        @logger.expects(:notify_with_level!).with do |level, hash|
+          level == GELF::INFO &&
+          hash['short_message'] == 'Some message' &&
+          hash['facility'] == 'gelf-rb'
+        end
+        @logger.add(GELF::INFO, { :short_message => "Some message" })
+      end
+
+      # logger.add(Logger::INFO, { :short_message => "Some message", :_foo => "bar", "_zomg" => "wat" })
+      should "implement add method with level and message from hash, facility from defaults and some additional fields" do
+        @logger.expects(:notify_with_level!).with do |level, hash|
+          level == GELF::INFO &&
+          hash['short_message'] == 'Some message' &&
+          hash['facility'] == 'gelf-rb' &&
+          hash['_foo'] == 'bar' &&
+          hash['_zomg'] == 'wat'
+        end
+        @logger.add(GELF::INFO, { :short_message => "Some message", :_foo => "bar", "_zomg" => "wat"})
+      end
+
+      # logger.add(Logger::INFO, "somefac", { :short_message => "Some message", :_foo => "bar", "_zomg" => "wat" })
+      should "implement add method with level and message from hash, facility from parameters and some additional fields" do
+        @logger.expects(:notify_with_level!).with do |level, hash|
+          level == GELF::INFO &&
+          hash['short_message'] == 'Some message' &&
+          hash['facility'] == 'somefac' &&
+          hash['_foo'] == 'bar' &&
+          hash['_zomg'] == 'wat'
+        end
+        @logger.add(GELF::INFO, { :short_message => "Some message", :_foo => "bar", "_zomg" => "wat"}, "somefac")
+      end
     end
 
     GELF::Levels.constants.each do |const|