diff --git a/ChangeLog b/ChangeLog
index 1ab0d894d6..3bc5e71194 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Nov  6 21:05:20 2013  Masaki Matsushita  <glass.saga@gmail.com>
+
+	* array.c (rb_ary_reverse): use RARRAY_PTR_USE().
+
 Wed Nov  6 19:30:44 2013  Masaya Tarui  <tarui@ruby-lang.org>
 
 	* common.mk (help): add texts about gcbench.
diff --git a/array.c b/array.c
index e708cb13dd..2a85772c97 100644
--- a/array.c
+++ b/array.c
@@ -2176,13 +2176,15 @@ ary_reverse(VALUE *p1, VALUE *p2)
 VALUE
 rb_ary_reverse(VALUE ary)
 {
-    VALUE *p1, *p2;
+    VALUE *p2;
+    long len = RARRAY_LEN(ary);
 
     rb_ary_modify(ary);
-    if (RARRAY_LEN(ary) > 1) {
-	p1 = RARRAY_PTR(ary);
-	p2 = p1 + RARRAY_LEN(ary) - 1;	/* points last item */
-	ary_reverse(p1, p2);
+    if (len > 1) {
+	RARRAY_PTR_USE(ary, p1, {
+	    p2 = p1 + len - 1;	/* points last item */
+	    ary_reverse(p1, p2);
+	}); /* WB: no new reference */
     }
     return ary;
 }