@@ -1869,11 +1869,11 @@
 				    exceptionWithClass: isa];
 
 	return value;
 }
 
-- (of_unichar_t*)unicodeString
+- (const of_unichar_t*)unicodeString
 {
 	OFObject *object = [[[OFObject alloc] init] autorelease];
 	of_unichar_t *ret;
 	size_t i, j;