diff --git a/ChangeLog b/ChangeLog
index 45f04942d8..a2c7f12f1d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Aug  4 09:32:30 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
+
+	* proc.c: Removing duplicate doc [fix GH-987][ci skip]
+	  Patch by @ronakjangir47
+
 Tue Aug  4 09:21:58 2015  Richard Schneeman  <richard.schneeman+foo@gmail.com>
 
 	* doc/contributing.rdoc: fixed wrong instructions with OS X
diff --git a/proc.c b/proc.c
index 2339f114d9..2eb46ad5d2 100644
--- a/proc.c
+++ b/proc.c
@@ -1909,7 +1909,7 @@ rb_method_call_with_block(int argc, const VALUE *argv, VALUE method, VALUE pass_
  *  these is an <code>UnboundMethod</code> object.
  *
  *  Unbound methods can only be called after they are bound to an
- *  object. That object must be be a kind_of? the method's original
+ *  object. That object must be a kind_of? the method's original
  *  class.
  *
  *     class Square