diff --git a/mkconfig.rb b/mkconfig.rb
index e934342bca..157c43ba67 100644
--- a/mkconfig.rb
+++ b/mkconfig.rb
@@ -17,9 +17,9 @@ print %[
 # changes made to this file will be lost the next time ruby is built.
 
 module Config
-
   RUBY_VERSION == "#{version}" or
     raise "ruby lib version (#{version}) doesn't match executable version (\#{RUBY_VERSION})"
+
 ]
 
 print "  DESTDIR = '' if not defined? DESTDIR\n  CONFIG = {}\n"