1 files changed, 1 insertions, 1 deletions
diff --git a/object.c b/object.c
index cc674b1584..41cdbb69d2 100644
--- a/object.c
+++ b/object.c
@@ -1523,7 +1523,7 @@ rb_mod_freeze(VALUE mod)
  *     mod === obj    -> true or false
  *
  *  Case Equality---Returns <code>true</code> if <i>obj</i> is an
- *  instance of <i>mod</i> or and instance of one of <i>mod</i>'s descendants.
+ *  instance of <i>mod</i> or an instance of one of <i>mod</i>'s descendants.
  *  Of limited use for modules, but can be used in <code>case</code> statements
  *  to classify objects by class.
  */