diff --git a/ChangeLog b/ChangeLog
index 5307edb7c3..d5b1686840 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Nov 16 10:45:00 2011  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* ext/-test-/num2int/num2int.c: remove an unnecessary and wrong decl
+	  of rb_stdout.  it's declared in ruby.h correctly.
+
 Wed Nov 16 10:26:41 2011  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* bignum.c (rb_big2ull): add a cast to get rid of a VC++ warning.
diff --git a/ext/-test-/num2int/num2int.c b/ext/-test-/num2int/num2int.c
index 8f99079253..5230896658 100644
--- a/ext/-test-/num2int/num2int.c
+++ b/ext/-test-/num2int/num2int.c
@@ -1,7 +1,5 @@
 #include <ruby.h>
 
-extern VALUE rb_stdout;
-
 static VALUE
 print_num2short(VALUE obj, VALUE num)
 {