diff --git a/hash.c b/hash.c
index 5194579..ed4ad4d 100644
--- a/hash.c
+++ b/hash.c
@@ -596,7 +596,7 @@ rb_hash_default(int argc, VALUE *argv, VALUE hash)
  *     hsh.default = obj     => obj
  *
  *  Sets the default value, the value returned for a key that does not
- *  exist in the hash. It is not possible to set the a default to a
+ *  exist in the hash. It is not possible to set the default to a
  *  <code>Proc</code> that will be executed on each key lookup.
  *
  *     h = { "a" => 100, "b" => 200 }
-- 
1.6.0.4