diff --git a/ChangeLog b/ChangeLog
index 82874d5cf2..af83a9bef5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Jun  1 23:17:00 2013  Charlie Somerville  <charliesome@ruby-lang.org>
+
+	* vm_eval.c (rb_mod_module_eval): mention in docs that arguments passed
+	  to the method are passed to the block
+
 Sat Jun  1 17:58:13 2013  Akinori MUSHA  <knu@iDaemons.org>
 
 	* lib/set.rb (Set#freeze, taint, untaint): Save a "self" by
diff --git a/vm_eval.c b/vm_eval.c
index c27df07ff7..8311544139 100644
--- a/vm_eval.c
+++ b/vm_eval.c
@@ -1663,6 +1663,8 @@ rb_mod_module_eval(int argc, VALUE *argv, VALUE mod)
  *
  *  Evaluates the given block in the context of the class/module.
  *  The method defined in the block will belong to the receiver.
+ *  Any arguments passed to the method will be passed to the block.
+ *  This can be used if the block needs to access instance variables.
  *
  *     class Thing
  *     end