@@ -620,20 +620,20 @@
 
 	free((char*)self - PRE_IVAR_ALIGN);
 }
 
 /* Required to use properties with the Apple runtime */
-- (id)copyWithZone: (void*)zone
+- copyWithZone: (void*)zone
 {
 	if (zone != NULL)
 		@throw [OFNotImplementedException newWithClass: isa
 						      selector: _cmd];
 
 	return [(id)self copy];
 }
 
-- (id)mutableCopyWithZone: (void*)zone
+- mutableCopyWithZone: (void*)zone
 {
 	if (zone != NULL)
 		@throw [OFNotImplementedException newWithClass: isa
 						      selector: _cmd];
 
@@ -707,17 +707,17 @@
 {
 	@throw [OFNotImplementedException newWithClass: self
 					      selector: _cmd];
 }
 
-+ (id)copyWithZone: (void*)zone
++ copyWithZone: (void*)zone
 {
 	@throw [OFNotImplementedException newWithClass: self
 					      selector: _cmd];
 }
 
-+ (id)mutableCopyWithZone: (void*)zone
++ mutableCopyWithZone: (void*)zone
 {
 	@throw [OFNotImplementedException newWithClass: self
 					      selector: _cmd];
 }
 @end