@@ -395,11 +395,11 @@
 - (id)copy
 {
 	return [self retain];
 }
 
-- (of_comparison_result_t)compare: (id <OFComparing>)object
+- (of_comparison_result_t)compare: (id <OFObject, OFComparing>)object
 {
 	OFDate *otherDate;
 
 	if (![object isKindOfClass: [OFDate class]])
 		@throw [OFInvalidArgumentException exception];