@@ -717,16 +717,16 @@
 		return NO;
 
 	return YES;
 }
 
-- (id)copy
+- copy
 {
 	return [self retain];
 }
 
-- (id)mutableCopy
+- mutableCopy
 {
 	return [[OFMutableString alloc] initWithString: self];
 }
 
 - (of_comparison_result_t)compare: (OFString*)str