diff --git a/ChangeLog b/ChangeLog
index e65788f5bb..356d2fcadc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,8 @@ Sun Aug 31 22:46:55 2003  WATANABE Hirofumi  <eban@ruby-lang.org>
 
 	* eval.c (TAG_DST()): take no argument.
 
+	* process.c (p_gid_sw_ensure): return VALUE.
+
 Sun Aug 31 22:27:10 2003    <nagai@dumbo.ai.kyutech.ac.jp>
 
 	* process.c (p_gid_sw_ensure): lack of function type
diff --git a/process.c b/process.c
index e85cd8412e..2cfed92a41 100644
--- a/process.c
+++ b/process.c
@@ -2192,7 +2192,7 @@ p_gid_sw_ensure(id)
     int id;
 {
     under_gid_switch = 0;
-    rb_setegid_core(id);
+    return rb_setegid_core(id);
 }
 
 static VALUE
@@ -2236,7 +2236,7 @@ p_gid_sw_ensure(obj)
     VALUE obj;
 {
     under_gid_switch = 0;
-    p_gid_exchange(obj);
+    return p_gid_exchange(obj);
 }
 
 static VALUE