diff --git a/ChangeLog b/ChangeLog
index 995864ae4f..0d215218e6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Jun  4 15:45:41 2008  Akinori MUSHA  <knu@iDaemons.org>
+
+	* enumerator.c (enumerator_with_index, enumerator_with_memo): Fix
+	  grammo in rdoc.
+
 Wed Jun  4 13:06:58 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* configure.in (CFLAGS, CXXFLAGS): include additional flags to
diff --git a/enumerator.c b/enumerator.c
index 671f1f74c9..afde97e19a 100644
--- a/enumerator.c
+++ b/enumerator.c
@@ -335,7 +335,7 @@ enumerator_with_index_i(VALUE val, VALUE *memo)
  *    e.with_index {|(*args), idx| ... }
  *    e.with_index
  *
- *  Iterates the given block for each elements with an index, which
+ *  Iterates the given block for each element with an index, which
  *  start from 0.  If no block is given, returns an enumerator.
  *
  */
@@ -365,10 +365,10 @@ enumerator_with_memo_i(VALUE val, VALUE memo)
 
 /*
  *  call-seq:
- *    e.with_memo(memo) {|(*args), memo| ... }
- *    e.with_memo(memo)
+ *    e.with_memo(obj) {|(*args), memo_obj| ... }
+ *    e.with_memo(obj)
  *
- *  Iterates the given block for each elements with an arbitrary
+ *  Iterates the given block for each element with an arbitrary
  *  object given, and returns the memo object.
  *
  *  If no block is given, returns an enumerator.