diff --git a/ChangeLog b/ChangeLog
index 0e0a4f3a92..9b14dfc566 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Jun 18 21:08:14 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ruby.c (verbose_setter, opt_W_getter): fixed prototypes.
+
 Wed Jun 18 19:20:00 2008  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* ruby.c (opt_W_getter): use ruby_verbose directly instead of parameter
diff --git a/ruby.c b/ruby.c
index ab26e245a8..027b15f051 100644
--- a/ruby.c
+++ b/ruby.c
@@ -1440,15 +1440,17 @@ forbid_setid(const char *s, struct cmdline_options *opt)
 }
 
 static void
-verbose_setter(VALUE val, ID id, VALUE *variable)
+verbose_setter(VALUE val, ID id, void *data)
 {
-    ruby_verbose = RTEST(val) ? Qtrue : val;
+    VALUE *variable = data;
+    *variable = RTEST(val) ? Qtrue : val;
 }
 
 static VALUE
-opt_W_getter(VALUE val, ID id, VALUE *variable)
+opt_W_getter(ID id, void *data)
 {
-    switch (ruby_verbose) {
+    VALUE *variable = data;
+    switch (*variable) {
       case Qnil:
 	return INT2FIX(0);
       case Qfalse: