diff --git a/src/Binance/Symbol.cs b/src/Binance/Symbol.cs
index 77e1b51b..36c67fe7 100644
--- a/src/Binance/Symbol.cs
+++ b/src/Binance/Symbol.cs
@@ -504,7 +504,7 @@ public static void UpdateCache(IEnumerable<Symbol> symbols)
         {
             Throw.IfNull(symbols, nameof(symbols));
 
-            if (symbols.Any())
+            if (!symbols.Any())
                 throw new ArgumentException("Enumerable must not be empty.", nameof(symbols));
 
             lock (_sync)