diff --git a/src/clob/clob.validators.ts b/src/clob/clob.validators.ts
index 13a849f872..7bf9ab9cc7 100644
--- a/src/clob/clob.validators.ts
+++ b/src/clob/clob.validators.ts
@@ -112,7 +112,7 @@ export const validateOrderId: Validator = mkValidator(
 export const validateOrderType: Validator = mkValidator(
   'orderType',
   invalidOrderTypeError,
-  (val) => typeof val === 'string' && (val === 'LIMIT' || val === 'LIMIT_MAKER')
+  (val) => typeof val === 'string' && (val === 'LIMIT' || val === 'LIMIT_MAKER' || val === 'MARKET')
 );
 
 const NETWORK_VALIDATIONS = [validateConnector, validateChain, validateNetwork];