diff --git a/src/Microsoft.AspNetCore.SignalR.Core/HubLifetimeManager.cs b/src/Microsoft.AspNetCore.SignalR.Core/HubLifetimeManager.cs
index 9e57825636..826da7faf3 100644
--- a/src/Microsoft.AspNetCore.SignalR.Core/HubLifetimeManager.cs
+++ b/src/Microsoft.AspNetCore.SignalR.Core/HubLifetimeManager.cs
@@ -24,7 +24,7 @@ namespace Microsoft.AspNetCore.SignalR
 
         public abstract Task AddGroupAsync(string connectionId, string groupName);
 
-        public abstract Task RemoveGroupAsync(string connnectionId, string groupName);
+        public abstract Task RemoveGroupAsync(string connectionId, string groupName);
     }
 
 }