@@ -87,10 +87,15 @@
 	  fromBuffer: (const void*)buffer
 {
 	@throw [OFNotImplementedException newWithClass: isa
 					      selector: _cmd];
 }
+
+- copy
+{
+	return [self retain];
+}
 
 - (BOOL)isAtEndOfStream
 {
 	if (cache != NULL)
 		return NO;