diff --git a/src/Microsoft.Azure.SignalR/ServiceOptionsSetup.cs b/src/Microsoft.Azure.SignalR/ServiceOptionsSetup.cs
index 2619185d0..b261c04a3 100644
--- a/src/Microsoft.Azure.SignalR/ServiceOptionsSetup.cs
+++ b/src/Microsoft.Azure.SignalR/ServiceOptionsSetup.cs
@@ -37,7 +37,8 @@ public IChangeToken GetChangeToken()
 
         private (string AppName, string ConnectionString, ServerStickyMode StickyMode, ServiceEndpoint[] Endpoints) ParseConfiguration()
         {
-            var appName = _configuration[Constants.Keys.ApplicationNameDefaultKeyPrefix];
+            // For backward compatability, first read from prefix
+            var appName = _configuration[Constants.Keys.ApplicationNameDefaultKeyPrefix] ?? _configuration[Constants.Keys.ApplicationNameDefaultKey];
             var stickyMode = ServerStickyMode.Disabled;
             var mode = _configuration[Constants.Keys.ServerStickyModeDefaultKey];
             if (!string.IsNullOrEmpty(mode))
@@ -58,4 +59,4 @@ public IChangeToken GetChangeToken()
             return (appName, connectionString, stickyMode, endpoints);
         }
     }
-}
\ No newline at end of file
+}