diff --git a/lib/semlogger.rb b/lib/semlogger.rb
index 57b17e9..cd3340a 100644
--- a/lib/semlogger.rb
+++ b/lib/semlogger.rb
@@ -35,7 +35,8 @@ class Semlogger < ::Logger
 
 	def format_msg msg
 		case msg
-		when String, Numeric, true, false, nil then [msg]
+		when Numeric, true, false, nil then [:const, msg]
+		when String then [:str, msg]
 		when Exception then [:exception, msg.class.name, msg.message.to_s, msg.backtrace]
 		else [:obj, msg]
 		end
diff --git a/lib/semlogger/writer.rb b/lib/semlogger/writer.rb
index a7dd419..f4ddab5 100644
--- a/lib/semlogger/writer.rb
+++ b/lib/semlogger/writer.rb
@@ -7,7 +7,7 @@ class Semlogger::Writer < Semlogger::Output
 	end
 
 	def add severity, time, progname, data, tags, message
-		@logdev.write [severity, time, progname, data, tags, message].to_json
+		@logdev.write [severity, time, progname, data, tags, message].to_json+"\n"
 	end
 end
 
@@ -24,7 +24,7 @@ class Semlogger::Printer < Semlogger::Output
 				r = "Exception: #{message[2]} (#{message[1]}"
 				r << "\n\t" << message[3].join( "\n\t")  if message[3]
 				r
-			when String, Numeric, true, false, nil then message[0]
+			when :str, :const then message[1]
 			when :obj then message[1].inspect
 			else message.inspect
 			end