@@ -628,11 +628,11 @@
 		[self finishInitialization];
 
 	return [super doubleValue];
 }
 
-- (of_unichar_t*)unicodeString
+- (const of_unichar_t*)unicodeString
 {
 	if (initialized != SIZE_MAX)
 		[self finishInitialization];
 
 	return [super unicodeString];