diff --git a/ChangeLog b/ChangeLog
index 8794e6d866..020031aa9f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sun Aug 31 22:27:10 2003    <nagai@dumbo.ai.kyutech.ac.jp>
+
+	* process.c (p_gid_sw_ensure): lack of function type
+
 Sun Aug 31 12:25:06 2003  Nobuyoshi Nakada  <nobu.nokada@softhome.net>
 
 	* lib/optparse.rb: --version takes an optional argument; "all" or
diff --git a/process.c b/process.c
index b1c1330783..e85cd8412e 100644
--- a/process.c
+++ b/process.c
@@ -2231,6 +2231,7 @@ p_gid_switch(obj)
 	rb_sys_fail(0);
     }
 #else
+static VALUE
 p_gid_sw_ensure(obj)
     VALUE obj;
 {