diff --git a/EIPS/eip-721.md b/EIPS/eip-721.md
index 24482ce6..645ad0df 100644
--- a/EIPS/eip-721.md
+++ b/EIPS/eip-721.md
@@ -46,7 +46,7 @@ pragma solidity ^0.4.20;
 
 /// @title ERC-721 Non-Fungible Token Standard
 /// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
-///  Note: the ERC-165 identifier for this interface is 0x6466353c
+///  Note: the ERC-165 identifier for this interface is 0x80ac58cd
 interface ERC721 /* is ERC165 */ {
     /// @dev This emits when ownership of any NFT changes by any mechanism.
     ///  This event emits when NFTs are created (`from` == 0) and destroyed