diff --git a/tool/compile_prelude.rb b/tool/compile_prelude.rb
index 93a6dd9cf0..7cf54110cc 100755
--- a/tool/compile_prelude.rb
+++ b/tool/compile_prelude.rb
@@ -79,7 +79,7 @@ class Prelude
 /* -*-c-*-
  THIS FILE WAS AUTOGENERATED BY tool/compile_prelude.rb. DO NOT EDIT.
 
- soruces: <%= @preludes.map {|n,*| prelude_base(n)}.join(', ') %>
+ sources: <%= @preludes.map {|n,*| prelude_base(n)}.join(', ') %>
 */
 #include "ruby/ruby.h"
 #include "vm_core.h"