diff --git a/BizHawk.Emulation.Cores/Consoles/Sega/gpgx/GPGX.cs b/BizHawk.Emulation.Cores/Consoles/Sega/gpgx/GPGX.cs
index b1e90dbd0c..88fbaa2668 100644
--- a/BizHawk.Emulation.Cores/Consoles/Sega/gpgx/GPGX.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Sega/gpgx/GPGX.cs
@@ -381,8 +381,7 @@ namespace BizHawk.Emulation.Cores.Consoles.Sega.gpgx
 
 		private readonly InputCallbackSystem _inputCallbacks = new InputCallbackSystem();
 
-		// TODO: optimize managed to unmanaged using the ActiveChanged event
-		public IInputCallbackSystem InputCallbacks { [FeatureNotImplemented]get { return _inputCallbacks; } }
+		public IInputCallbackSystem InputCallbacks { get { return _inputCallbacks; } }
 
 		#endregion