diff --git a/ruby.c b/ruby.c
index 4fe0464063..7db0736f72 100644
--- a/ruby.c
+++ b/ruby.c
@@ -1225,7 +1225,7 @@ rb_f_chomp(argc, argv)
     return str;
 }
 
-/* blank function in dmyencoding.c or generated by enc/make_encmake.rb */
+/* blank function in dmyext.c or generated by enc/make_encmake.rb */
 extern void Init_enc(void);
 
 static VALUE