diff --git a/ChangeLog b/ChangeLog
index 1769ad28dd..f2e2a11d6a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Sep 20 23:37:40 2013  Zachary Scott  <e@zzak.io>
+
+	* lib/securerandom.rb: [DOC] SecureRandom.hex length argument
+	  [Fixes GH-394] Patch by @avdi https://github.com/ruby/ruby/pull/394
+
 Fri Sep 20 23:34:48 2013  Zachary Scott  <e@zzak.io>
 
 	* benchmark/bm_app_answer.rb: removed duplicate code [Fixes GH-393]
diff --git a/lib/securerandom.rb b/lib/securerandom.rb
index b1603b4ca9..f12bc00114 100644
--- a/lib/securerandom.rb
+++ b/lib/securerandom.rb
@@ -116,10 +116,10 @@ module SecureRandom
     raise NotImplementedError, "No random device"
   end
 
-  # SecureRandom.hex generates a random hex string.
+  # SecureRandom.hex generates a random hexadecimal string.
   #
-  # The argument _n_ specifies the length of the random length.
-  # The length of the result string is twice of _n_.
+  # The argument _n_ specifies the length, in bytes, of the random number to be generated.
+  # The length of the resulting hexadecimal string is twice _n_.
   #
   # If _n_ is not specified, 16 is assumed.
   # It may be larger in future.