diff --git a/lib/asm/ast_assembler.rb b/unused/ast_assembler.rb
similarity index 100%
rename from lib/asm/ast_assembler.rb
rename to unused/ast_assembler.rb
diff --git a/unused/code_generator.rb b/unused/code_generator.rb
index 0c9a104a..04221581 100644
--- a/unused/code_generator.rb
+++ b/unused/code_generator.rb
@@ -13,6 +13,7 @@ if (__FILE__ == $0)
   	swi 0
   }
 
+  gen.data("printf"+ "\x00")
   require 'asm/object_writer'
   writer = Asm::ObjectWriter.new(Elf::Constants::TARGET_ARM)
   writer.set_text gen.assemble