diff --git a/ChangeLog b/ChangeLog
index 63981b3c81..6513b14598 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Dec 16 19:19:19 2013  Koichi Sasada  <ko1@atdot.net>
+
+	* gc.c (rb_objspace_markable_object_p): should check special_const_p
+	  first (by is_markable_object()).
+
 Mon Dec 16 19:12:54 2013  Koichi Sasada  <ko1@atdot.net>
 
 	* ext/objspace/objspace.c (reachable_object_from_root_i): use
diff --git a/gc.c b/gc.c
index 46cc440572..9328d76eeb 100644
--- a/gc.c
+++ b/gc.c
@@ -2267,7 +2267,7 @@ int
 rb_objspace_markable_object_p(VALUE obj)
 {
     rb_objspace_t *objspace = &rb_objspace;
-    return is_live_object(objspace, obj) && is_markable_object(objspace, obj);
+    return is_markable_object(objspace, obj) && is_live_object(objspace, obj);
 }
 
 /*