@@ -255,21 +255,21 @@
 						       selector: _cmd];
 
 	[self appendCString: [string_ cString]];
 }
 
-- (void)appendFormat: (OFString*)format, ...
+- (void)appendFormat: (OFConstantString*)format, ...
 {
 	va_list arguments;
 
 	va_start(arguments, format);
 	[self appendFormat: format
 	     withArguments: arguments];
 	va_end(arguments);
 }
 
-- (void)appendFormat: (OFString*)format
+- (void)appendFormat: (OFConstantString*)format
        withArguments: (va_list)arguments
 {
 	char *t;
 	int len;