diff --git a/ChangeLog b/ChangeLog
index 55faebeb46..7a55e498e3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Nov  9 09:16:36 2013  Masaya Tarui  <tarui@ruby-lang.org>
+
+	* gc.c (RVALUE_PROMOTE_INFANT): Refactoring. Remove duplicated nonsense
+	  code.
+
 Sat Nov  9 09:04:48 2013  Masaya Tarui  <tarui@ruby-lang.org>
 
 	* gc.c (gc_marks_test): Bugfix. Fix a struct member name for build
diff --git a/gc.c b/gc.c
index 087efcd0e6..4fb2a3c5d0 100644
--- a/gc.c
+++ b/gc.c
@@ -778,12 +778,6 @@ RVALUE_PROMOTE_INFANT(VALUE obj)
 #endif
     }
 #endif
-
-#if !RGENGC_THREEGEN
-    /* infant -> old */
-    MARK_IN_BITMAP(GET_HEAP_OLDGEN_BITS(obj), obj);
-    check_gen_consistency(obj);
-#endif
 }
 
 #if RGENGC_THREEGEN