diff --git a/essentials-framework/Essentials Core/PepperDashEssentialsBase/Routing/RoutingInterfaces.cs b/essentials-framework/Essentials Core/PepperDashEssentialsBase/Routing/RoutingInterfaces.cs
index 467bf045..e24480ff 100644
--- a/essentials-framework/Essentials Core/PepperDashEssentialsBase/Routing/RoutingInterfaces.cs	
+++ b/essentials-framework/Essentials Core/PepperDashEssentialsBase/Routing/RoutingInterfaces.cs	
@@ -204,4 +204,11 @@ namespace PepperDash.Essentials.Core
             SigType = sigType;
         }
     }
+
+	public interface IRoutingSyncProvider
+	{
+		event RoutingSyncProviderDelegate SyncChanged;
+	}
+
+	public delegate void RoutingSyncProviderDelegate(uint inputNumber, bool hasSync);
 }
\ No newline at end of file