diff --git a/contracts/token/ERC20/ERC20.sol b/contracts/token/ERC20/ERC20.sol
index 0ca686a95..38a4cfa8f 100644
--- a/contracts/token/ERC20/ERC20.sol
+++ b/contracts/token/ERC20/ERC20.sol
@@ -41,11 +41,6 @@ abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {
     string private _name;
     string private _symbol;
 
-    /**
-     * @dev Indicates a failed `decreaseAllowance` request.
-     */
-    error ERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);
-
     /**
      * @dev Sets the values for {name} and {symbol}.
      *