@@ -61,11 +61,12 @@
 } of_number_type_t;
 
 /**
  * \brief Provides a way to store a number in an object.
  */
-@interface OFNumber: OFObject <OFCopying, OFSerialization, OFJSONRepresentation>
+@interface OFNumber: OFObject <OFCopying, OFComparing, OFSerialization,
+    OFJSONRepresentation>
 {
 	union of_number_value {
 		BOOL	       bool_;
 		signed char    char_;
 		signed short   short_;