diff --git a/std-script/compile b/std-script/compile
--- a/std-script/compile
+++ b/std-script/compile
@@ -106,7 +106,7 @@
   when "c++"
   command = "#{CPLUSPLUS_COMPILER} -E #{params[:source_file]} -o source_prep.cpp"
   system(command)
-  command = "#{CPLUSPLUS_COMPILER} #{redefine_str} #{params[:source_file]} -o #{params[:output_file]} #{CPLUSPLUS_OPTIONS} 2> #{params[:message_file]}"
+  command = "#{CPLUSPLUS_COMPILER} #{redefine_str} source_prep.cpp -o #{params[:output_file]} #{CPLUSPLUS_OPTIONS} 2> #{params[:message_file]}"
   system(command)
   
   when "pas"