diff --git a/contracts/upgradeable_contracts/BasicAMBMediator.sol b/contracts/upgradeable_contracts/BasicAMBMediator.sol
index 09aa7aef..1fd3d63e 100644
--- a/contracts/upgradeable_contracts/BasicAMBMediator.sol
+++ b/contracts/upgradeable_contracts/BasicAMBMediator.sol
@@ -13,7 +13,6 @@ contract BasicAMBMediator is Ownable {
     bytes32 internal constant BRIDGE_CONTRACT = 0x811bbb11e8899da471f0e69a3ed55090fc90215227fc5fb1cb0d6e962ea7b74f; // keccak256(abi.encodePacked("bridgeContract"))
     bytes32 internal constant MEDIATOR_CONTRACT = 0x98aa806e31e94a687a31c65769cb99670064dd7f5a87526da075c5fb4eab9880; // keccak256(abi.encodePacked("mediatorContract"))
     bytes32 internal constant REQUEST_GAS_LIMIT = 0x2dfd6c9f781bb6bbb5369c114e949b69ebb440ef3d4dd6b2836225eb1dc3a2be; // keccak256(abi.encodePacked("requestGasLimit"))
-    bytes32 internal constant NONCE = 0x7ab1577440dd7bedf920cb6de2f9fc6bf7ba98c78c85a3fa1f8311aac95e1759; // keccak256(abi.encodePacked("nonce"))
 
     /**
     * @dev Sets the AMB bridge contract address. Only the owner can call this method.
diff --git a/contracts/upgradeable_contracts/TokenBridgeMediator.sol b/contracts/upgradeable_contracts/TokenBridgeMediator.sol
index 44908f89..33b8de1d 100644
--- a/contracts/upgradeable_contracts/TokenBridgeMediator.sol
+++ b/contracts/upgradeable_contracts/TokenBridgeMediator.sol
@@ -86,8 +86,6 @@ contract TokenBridgeMediator is BasicAMBMediator, BasicTokenBridge {
     /**
     * @dev Handles the bridged tokens. Checks that the value is inside the execution limits and invokes the method
     * to execute the Mint or Unlock accordingly.
-    * nonce parameter is a unique message identifier on AMB bridge, it is not actually used by this method,
-    * it serves as unique reference.
     * @param _recipient address that will receive the tokens
     * @param _value amount of tokens to be received
     */