diff --git a/ChangeLog b/ChangeLog
index 61a5092265..abded68d31 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Sat Oct 24 01:51:01 2015  Akinori MUSHA  <knu@iDaemons.org>
+
+	* NEWS: [DOC] In the new safe call syntax, arguments are evaluated
+	  only if a call is made.
+
+	* doc/syntax/calling_methods.rdoc: Fix a typo.
+
 Sat Oct 24 00:38:34 2015  Shugo Maeda  <shugo@ruby-lang.org>
 
 	* lib/forwardable (def_instance_delegator, def_single_delegator):
diff --git a/NEWS b/NEWS
index 6be8737c4e..1433dee4d6 100644
--- a/NEWS
+++ b/NEWS
@@ -22,10 +22,13 @@ with all sufficient information, see the ChangeLog file.
 
   * new method call syntax, `object.?foo', method #foo is called on
     `object' if it is not nil.
-    this is similar to `try!' in Active Support, except for:
+    this is similar to `try!' in Active Support, except:
     * method name is syntactically required
           obj.try! {} # valid
           obj.? {}    # syntax error
+    * arguments are evaluated only if a call is made:
+          obj.try!(:foo, bar())  # bar() is always evaluated
+          obj.?foo(bar())        # bar() is conditionally evaluated
     * attribute assignment is valid
           obj.?attr += 1
 
diff --git a/doc/syntax/calling_methods.rdoc b/doc/syntax/calling_methods.rdoc
index db0217cfef..99ec48af40 100644
--- a/doc/syntax/calling_methods.rdoc
+++ b/doc/syntax/calling_methods.rdoc
@@ -29,7 +29,7 @@ NoMethodError.
 
 You may use <code>.?</code> to designate a receiver, then +my_method+ is not
 invoked and the result is +nil+ when the receiver is +nil+.  In that case, the
-argument of +my_method+ are not evaluated.
+arguments of +my_method+ are not evaluated.
 
 You may also use <code>::</code> to designate a receiver, but this is rarely
 used due to the potential for confusion with <code>::</code> for namespaces.