diff --git a/Assets/Cryville/Crtr/InputProxy.cs b/Assets/Cryville/Crtr/InputProxy.cs
index dfb3eb7..81a1020 100644
--- a/Assets/Cryville/Crtr/InputProxy.cs
+++ b/Assets/Cryville/Crtr/InputProxy.cs
@@ -43,8 +43,10 @@ namespace Cryville.Crtr {
 			if (_use[proxy.Target] > 0)
 				throw new InvalidOperationException("Input already assigned");
 			if (proxy.Source != null) {
-				proxy.Source.Value.Handler.OnInput -= OnInput; // Prevent duplicated hooks, no exception will be thrown
-				proxy.Source.Value.Handler.OnInput += OnInput;
+				if (_judge != null) {
+					proxy.Source.Value.Handler.OnInput -= OnInput; // Prevent duplicated hooks, no exception will be thrown
+					proxy.Source.Value.Handler.OnInput += OnInput;
+				}
 				_tproxies.Add(proxy.Target, proxy);
 				_sproxies.Add(proxy.Source.Value, proxy);
 				IncrementUseRecursive(name);
@@ -53,7 +55,7 @@ namespace Cryville.Crtr {
 		}
 		void Remove(InputProxyEntry proxy) {
 			var name = proxy.Target;
-			proxy.Source.Value.Handler.OnInput -= OnInput;
+			if (_judge != null) _tproxies[name].Source.Value.Handler.OnInput -= OnInput;
 			_sproxies.Remove(_tproxies[name].Source.Value);
 			_tproxies.Remove(name);
 			DecrementUseRecursive(name);