diff --git a/BitMart.Net/SymbolOrderBooks/BitMartOrderBookFactory.cs b/BitMart.Net/SymbolOrderBooks/BitMartOrderBookFactory.cs
index de48103..3f88f12 100644
--- a/BitMart.Net/SymbolOrderBooks/BitMartOrderBookFactory.cs
+++ b/BitMart.Net/SymbolOrderBooks/BitMartOrderBookFactory.cs
@@ -27,7 +27,7 @@ public BitMartOrderBookFactory(IServiceProvider serviceProvider)
             
             UsdFutures = new OrderBookFactory<BitMartOrderBookOptions>((symbol, options) => CreateUsdFutures(symbol, options), (baseAsset, quoteAsset, options) => CreateUsdFutures(baseAsset + quoteAsset, options));
 
-            Spot = new OrderBookFactory<BitMartOrderBookOptions>((symbol, options) => CreateSpot(symbol, options), (baseAsset, quoteAsset, options) => CreateSpot(baseAsset + quoteAsset, options));
+            Spot = new OrderBookFactory<BitMartOrderBookOptions>((symbol, options) => CreateSpot(symbol, options), (baseAsset, quoteAsset, options) => CreateSpot(baseAsset + "_" + quoteAsset, options));
 
         }