diff --git a/ChangeLog b/ChangeLog
index b9cf27a712..8fc3f8b7cc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Nov  4 15:39:32 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
+
+	* hash.c: use correct grammer. Patch by @tveastman
+	  [fix GH-1079][ci skip]
+
 Wed Nov  4 11:38:23 2015  Jake Worth  <jakeworth82@gmail.com>
 
 	* process.c (proc_getsid): [DOC] Fix double word 'for' and typo.
diff --git a/hash.c b/hash.c
index ea78018a3a..974ac53888 100644
--- a/hash.c
+++ b/hash.c
@@ -721,7 +721,7 @@ rb_hash_rehash_i(VALUE key, VALUE value, VALUE arg)
  *  Rebuilds the hash based on the current hash values for each key. If
  *  values of key objects have changed since they were inserted, this
  *  method will reindex <i>hsh</i>. If <code>Hash#rehash</code> is
- *  called while an iterator is traversing the hash, an
+ *  called while an iterator is traversing the hash, a
  *  <code>RuntimeError</code> will be raised in the iterator.
  *
  *     a = [ "a", "b" ]