diff --git a/ChangeLog b/ChangeLog
index e78a3db4ed..080f1c1302 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Wed Jun 24 09:23:03 2015  Eric Wong  <e@80x24.org>
+
+	* variable.c (generic_ivar_set): remove FL_ABLE check
+	  (gen_ivar_copy): ditto
+	  [ruby-core:69715]
+
 Wed Jun 24 08:28:15 2015  Eric Wong  <e@80x24.org>
 
 	* ext/socket/ancdata.c (bsock_recvmsg_internal): reduce stack use
diff --git a/variable.c b/variable.c
index e130ee1149..bb8b6dbbb8 100644
--- a/variable.c
+++ b/variable.c
@@ -1357,7 +1357,7 @@ generic_ivar_set(VALUE obj, ID id, VALUE val)
 
     ivup.u.ivtbl->ivptr[ivup.index] = val;
 
-    if (FL_ABLE(obj)) RB_OBJ_WRITTEN(obj, Qundef, val);
+    RB_OBJ_WRITTEN(obj, Qundef, val);
 }
 
 VALUE
@@ -1541,7 +1541,7 @@ gen_ivar_copy(ID id, VALUE val, st_data_t arg)
     }
     c->ivtbl->ivptr[ivup.index] = val;
 
-    if (FL_ABLE(c->obj)) RB_OBJ_WRITTEN(c->obj, Qundef, val);
+    RB_OBJ_WRITTEN(c->obj, Qundef, val);
 
     return ST_CONTINUE;
 }