diff --git a/contracts/exchange-libs/contracts/src/LibExchangeRichErrors.sol b/contracts/exchange-libs/contracts/src/LibExchangeRichErrors.sol
index b1f6885821..04ce429e21 100644
--- a/contracts/exchange-libs/contracts/src/LibExchangeRichErrors.sol
+++ b/contracts/exchange-libs/contracts/src/LibExchangeRichErrors.sol
@@ -53,7 +53,6 @@ library LibExchangeRichErrors {
     }
 
     enum TransactionErrorCodes {
-        NO_REENTRANCY,
         ALREADY_EXECUTED,
         EXPIRED
     }
@@ -136,6 +135,10 @@ library LibExchangeRichErrors {
     bytes4 internal constant TRANSACTION_GAS_PRICE_ERROR_SELECTOR =
         0xa26dac09;
 
+    // bytes4(keccak256("TransactionInvalidContextError(bytes32,address)"))
+    bytes4 internal constant TRANSACTION_INVALID_CONTEXT_ERROR_SELECTOR =
+        0xdec4aedf;
+
     // bytes4(keccak256("IncompleteFillError(uint8,uint256,uint256)"))
     bytes4 internal constant INCOMPLETE_FILL_ERROR_SELECTOR =
         0x18e4b141;
@@ -610,6 +613,21 @@ library LibExchangeRichErrors {
         );
     }
 
+    function TransactionInvalidContextError(
+        bytes32 transactionHash,
+        address currentContextAddress
+    )
+        internal
+        pure
+        returns (bytes memory)
+    {
+        return abi.encodeWithSelector(
+            TRANSACTION_INVALID_CONTEXT_ERROR_SELECTOR,
+            transactionHash,
+            currentContextAddress
+        );
+    }
+
     function IncompleteFillError(
         IncompleteFillErrorCode errorCode,
         uint256 expectedAssetFillAmount,