diff --git a/pkg/types/order.go b/pkg/types/order.go
index 8f985033f..927922494 100644
--- a/pkg/types/order.go
+++ b/pkg/types/order.go
@@ -58,6 +58,7 @@ type OrderType string
 
 const (
 	OrderTypeLimit      OrderType = "LIMIT"
+	OrderTypeLimitMaker OrderType = "LIMIT_MAKER"
 	OrderTypeMarket     OrderType = "MARKET"
 	OrderTypeStopLimit  OrderType = "STOP_LIMIT"
 	OrderTypeStopMarket OrderType = "STOP_MARKET"