diff --git a/RDNET/RdNetClient.cs b/RDNET/RdNetClient.cs
index 8dd973b..cc7ecac 100644
--- a/RDNET/RdNetClient.cs
+++ b/RDNET/RdNetClient.cs
@@ -95,7 +95,7 @@ public RdNetClient(String? appId = null, HttpClient? httpClient = null, Int32 re
         _store.AppId= appId ?? "X245A4XAIBGVM";
         _store.RetryCount = retryCount;
 
-        if (apiHostname != null)
+        if (!String.IsNullOrWhiteSpace(apiHostname))
         {
             _store.ApiHostname = apiHostname;
         }