diff --git a/README.md b/README.md
index 5f8d838..7969a51 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,6 @@ TO DO AND DONE
 TODO
 ----
 
-* build packet with performance data
 * server side parsing of performance data
 * more documentations
 * mcrypt-support
@@ -30,6 +29,7 @@ DONE
 * server-API (recv from client)
 * check-API (describe checks and performance data)
 * fast usable API for sending checks
+* build packet with performance data
 
 Copyright
 =========
diff --git a/lib/nsca/check.rb b/lib/nsca/check.rb
index 2dd7f68..ccbc683 100644
--- a/lib/nsca/check.rb
+++ b/lib/nsca/check.rb
@@ -186,12 +186,12 @@ module NSCA
 	end
 
 	module Checks
-		def perfdata( cl, *params) const_set cl, NSCA::PerformanceData.new( *params) end
+		def perfdata( *params) NSCA::PerformanceData.new( *params) end
 
-		def check cl, service, hostname, perfdatas = nil
+		def check service, hostname, perfdatas = nil
 			perfdatas ||= []
 			perfdatas.map! {|cl| cl.is_a?( Symbol) ? const_get( cl) : cl }
-			const_set cl, NSCA::Check.new( service, hostname, perfdatas)
+			NSCA::Check.new service, hostname, perfdatas
 		end
 	end
 end