diff --git a/ChangeLog b/ChangeLog
index 55a2a97726..ec085e4891 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Fri Apr 11 17:06:01 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* enum.c (find_index_i): modified to shut warning up.
+
+	* enum.c (find_index_iter_i): ditto.
+
 Fri Apr 11 16:44:43 2008  Akinori MUSHA  <knu@iDaemons.org>
 
 	* enum.c (enum_find_index): Add support for find_index(obj);
diff --git a/enum.c b/enum.c
index d4de80d7b5..cbde2b4e87 100644
--- a/enum.c
+++ b/enum.c
@@ -186,8 +186,10 @@ enum_find(int argc, VALUE *argv, VALUE obj)
 }
 
 static VALUE
-find_index_i(VALUE i, VALUE *memo)
+find_index_i(VALUE i, VALUE memop, int argc, VALUE *argv)
 {
+    VALUE *memo = (VALUE*)memop;
+
     if (rb_equal(i, memo[2])) {
 	memo[0] = UINT2NUM(memo[1]);
 	rb_iter_break();
@@ -197,8 +199,9 @@ find_index_i(VALUE i, VALUE *memo)
 }
 
 static VALUE
-find_index_iter_i(VALUE i, VALUE *memo, int argc, VALUE *argv)
+find_index_iter_i(VALUE i, VALUE memop, int argc, VALUE *argv)
 {
+    VALUE *memo = (VALUE*)memop;
     if (RTEST(enum_yield(argc, argv))) {
 	memo[0] = UINT2NUM(memo[1]);
 	rb_iter_break();