diff --git a/contracts/IMastersFedi.sol b/contracts/IMastersFedi.sol
index 0f61177..7c0481b 100644
--- a/contracts/IMastersFedi.sol
+++ b/contracts/IMastersFedi.sol
@@ -5,6 +5,7 @@ pragma solidity ^0.8.17;
 interface IMastersFedi {
   function balanceOf(address account) external view returns (uint256);
   function allowance(address owner, address spender) external view returns (uint256);
+  function approve(address _spender, uint256 _value) external returns (bool success);
   function transferFrom(address _from, address _to, uint256 _value) external;
   function transfer(address _to, uint256 _value) external;
   function ipfs_hash() external view returns (string memory);