diff --git a/ChangeLog b/ChangeLog
index f5d172073b..cb37ecd81d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sun Feb 18 22:56:07 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/etc/etc.c (etc_getgrgid): missed to replace a macro.
+
 Sun Feb 18 19:33:00 2007  Tadayoshi Funaba  <tadf@dotrb.org>
 
 	* lib/date/format.rb: updated based on date2 4.0.3.
diff --git a/ext/etc/etc.c b/ext/etc/etc.c
index 54367a0431..5e15176b4e 100644
--- a/ext/etc/etc.c
+++ b/ext/etc/etc.c
@@ -326,7 +326,7 @@ etc_getgrgid(int argc, VALUE *argv, VALUE obj)
 
     rb_secure(4);
     if (rb_scan_args(argc, argv, "01", &id) == 1) {
-	gid = PW_VAL2GID(id);
+	gid = NUM2GIDT(id);
     }
     else {
 	gid = getgid();