diff --git a/ChangeLog b/ChangeLog
index 0cf8127575..8a715ee813 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed May  1 18:59:36 2013  Benoit Daloze  <eregontp@gmail.com>
+
+	* enum.c (Enumerable#chunk): fix grammar of error message
+	  for symbols beginning with an underscore [Bug #8351]
+
 Wed May  1 16:47:47 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/curses/extconf.rb (curses_version): try once for each tests, a
diff --git a/enum.c b/enum.c
index 25c41c969a..76f7343e9d 100644
--- a/enum.c
+++ b/enum.c
@@ -2358,7 +2358,7 @@ chunk_ii(VALUE i, VALUE _argp, int argc, VALUE *argv)
         }
     }
     else if (SYMBOL_P(v) && rb_id2name(SYM2ID(v))[0] == '_') {
-	rb_raise(rb_eRuntimeError, "symbol begins with an underscore is reserved");
+	rb_raise(rb_eRuntimeError, "symbols beginning with an underscore are reserved");
     }
     else {
         if (NIL_P(argp->prev_value)) {
@@ -2447,7 +2447,7 @@ chunk_i(VALUE yielder, VALUE enumerator, int argc, VALUE *argv)
  *  Any other symbols that begin with an underscore will raise an error:
  *
  *    items.chunk { |item| :_underscore }
- *    #=> RuntimeError: symbol begins with an underscore is reserved
+ *    #=> RuntimeError: symbols beginning with an underscore are reserved
  *
  *  +nil+ and +:_separator+ can be used to ignore some elements.
  *