I received my Schedule K-1 (Form 1065) after I filed my taxes, but there was no gain/loss. What do I do?

My buy/sell was reported on my 1099-B, however after I already filed my taxes I received a K-1 in the mail but there is no gain/loss on it at all.  Everything is "0" except my capital contributed and withdrawal (which is the same).  So do I need to file an amended return or do nothing?