diff --git a/ChangeLog b/ChangeLog
index c1562e3679..3fb3a3c523 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,7 +2,7 @@ Fri Jul  1 15:50:12 2005  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* missing/erf.c: need to include some headers for some platforms.
 
-	* win32/win32.c (copysign, scalb): define for compatibility with
+	* win32/win32.h (copysign, scalb): define for compatibility with
 	  other platforms. [ruby-dev:26430]
 
 Fri Jul  1 15:37:42 2005  Yukihiro Matsumoto  <matz@ruby-lang.org>