Index: src/OFDNSResourceRecord.h
==================================================================
--- src/OFDNSResourceRecord.h
+++ src/OFDNSResourceRecord.h
@@ -69,11 +69,11 @@
 /*!
  * @class OFDNSResourceRecord OFDNSResourceRecord.h ObjFW/OFDNSResourceRecord.h
  *
  * @brief A class representing a DNS resource record.
  */
-@interface OFDNSResourceRecord: OFObject
+@interface OFDNSResourceRecord: OFObject <OFCopying>
 {
 	OFString *_name;
 	of_dns_resource_record_class_t _recordClass;
 	of_dns_resource_record_type_t _recordType;
 	uint32_t _TTL;

Index: src/OFDNSResourceRecord.m
==================================================================
--- src/OFDNSResourceRecord.m
+++ src/OFDNSResourceRecord.m
@@ -154,10 +154,15 @@
 {
 	[_name release];
 
 	[super dealloc];
 }
+
+- (id)copy
+{
+	return [self retain];
+}
 
 - (OFString *)description
 {
 	return [OFString stringWithFormat:
 	    @"<%@:\n"