diff --git a/ChangeLog b/ChangeLog
index ee2e88c665..47d21b57ef 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Jul 31 23:02:47 2003  NAKAMURA Usaku <usa@ruby-lang.org>
+
+	* ext/etc/etc.c: revert getenv()'s prototype. use it only when _WIN32
+	  is not defined.
+
 Thu Jul 31 15:25:12 2003  NAKAMURA Usaku <usa@ruby-lang.org>
 
 	* array.c (rb_ary_collect): must get length of array for each
diff --git a/ext/etc/etc.c b/ext/etc/etc.c
index 50137c87b2..51668c400f 100644
--- a/ext/etc/etc.c
+++ b/ext/etc/etc.c
@@ -25,7 +25,9 @@
 
 static VALUE sPasswd, sGroup;
 
-char *getenv _((const char *));
+#ifndef _WIN32
+char *getenv();
+#endif
 char *getlogin();
 
 static VALUE