diff --git a/ChangeLog b/ChangeLog
index 0370ea99a8..849e42dfff 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Mar  9 22:38:26 2013  Zachary Scott  <zachary@zacharyscott.net>
+
+	* object.c (rb_obj_comp): Documenting Object#<=> return values
+	  Patch by Stefan Rusterholz
+
 Sat Mar  9 22:35:22 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* dir.c (file_s_fnmatch, fnmatch_brace): encoding-incompatible pattern
diff --git a/object.c b/object.c
index ceee4d47eb..76ff316543 100644
--- a/object.c
+++ b/object.c
@@ -1320,6 +1320,17 @@ rb_obj_not_match(VALUE obj1, VALUE obj2)
  *     obj <=> other -> 0 or nil
  *
  *  Returns 0 if obj === other, otherwise nil.
+ *
+ *  The <=> is used by various methods to compare objects, for example
+ *  Enumerable#sort, Enumerable#max etc.
+ *
+ *  Your implementation of <=> should return one of the following values: -1, 0,
+ *  1 or nil. -1 means self is smaller than other. 0 means self is equal to other.
+ *  1 means self is bigger than other. Nil means the two values could not be
+ *  compared.
+ *
+ *  When you defined <=>, you can include Comparable to gain the methods <=, <,
+ *  ==, >=, > and between?.
  */
 static VALUE
 rb_obj_cmp(VALUE obj1, VALUE obj2)
diff --git a/version.h b/version.h
index 911134b9c7..00f3eb7988 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.0.0"
 #define RUBY_RELEASE_DATE "2013-03-09"
-#define RUBY_PATCHLEVEL 32
+#define RUBY_PATCHLEVEL 33
 
 #define RUBY_RELEASE_YEAR 2013
 #define RUBY_RELEASE_MONTH 3