diff --git a/exchanges/bitmex/bitmex_websocket.go b/exchanges/bitmex/bitmex_websocket.go
index 56f9a494d76..1e9040e283b 100644
--- a/exchanges/bitmex/bitmex_websocket.go
+++ b/exchanges/bitmex/bitmex_websocket.go
@@ -6,6 +6,7 @@ import (
 	"net/http"
 	"net/url"
 	"strconv"
+	"strings"
 	"time"
 
 	"github.com/gorilla/websocket"
@@ -376,7 +377,7 @@ func (b *Bitmex) processOrderbook(data []OrderBookL2, action string, currencyPai
 			var bids, asks []orderbook.Item
 
 			for _, orderbookItem := range data {
-				if orderbookItem.Side == exchange.SellOrderSide.ToString() {
+				if strings.EqualFold(orderbookItem.Side, exchange.SellOrderSide.ToString()) {
 					asks = append(asks, orderbook.Item{
 						Price:  orderbookItem.Price,
 						Amount: float64(orderbookItem.Size),