diff --git a/ChangeLog b/ChangeLog
index f33415a366..abadb96020 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Jun  5 01:17:21 2015  Koichi Sasada  <ko1@atdot.net>
+
+	* vm_insnhelper.c (vm_defined): no need to use cast.
+
 Fri Jun  5 01:14:02 2015  Koichi Sasada  <ko1@atdot.net>
 
 	* vm_insnhelper.c (vm_defined): show additional messages on rb_bug().
diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index 1b8560583b..6670e89ea5 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -2468,7 +2468,7 @@ vm_defined(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_num_t op_type, VALUE
 	if (me) {
 	    const rb_method_definition_t *def = me->def;
 
-	    switch ((unsigned int)def->flags.visi) {
+	    switch (def->flags.visi) {
 	      case METHOD_VISI_PRIVATE:
 		break;
 	      case METHOD_VISI_PROTECTED: