diff --git a/ChangeLog b/ChangeLog
index ea1f3532b4..39f0db97fe 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Jun  4 12:47:54 SGT 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
+
+	* array.c: Revert r50763. because "reentered" is not typo.
+
 Thu Jun  4 11:12:29 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
 
 	* ext/win32ole/win32ole.c: fix a typo. Patch by @davydovanton
diff --git a/array.c b/array.c
index fc847e71a8..32f9f9ebe4 100644
--- a/array.c
+++ b/array.c
@@ -2382,7 +2382,7 @@ static VALUE
 sort_reentered(VALUE ary)
 {
     if (RBASIC(ary)->klass) {
-	rb_raise(rb_eRuntimeError, "sort re-entered");
+	rb_raise(rb_eRuntimeError, "sort reentered");
     }
     return Qnil;
 }