@@ -403,13 +403,13 @@
 	void *pool = objc_autoreleasePoolPush();
 
 	[ret appendFormat: @"; Domain=%@; Path=%@", _domain, _path];
 
 	if (_expires != nil)
-		[ret appendString:
-		    [_expires dateStringWithFormat: @"; Expires=%a, %d %b %Y "
-						    @"%H:%M:%S +0000"]];
+		[ret appendString: [(OFDate *)_expires
+		    dateStringWithFormat: @"; Expires=%a, %d %b %Y "
+					  @"%H:%M:%S +0000"]];
 
 	if (_secure)
 		[ret appendString: @"; Secure"];
 
 	if (_HTTPOnly)