diff --git a/Assets/Cryville/Crtr/InputProxy.cs b/Assets/Cryville/Crtr/InputProxy.cs
index 02a99cb..8003511 100644
--- a/Assets/Cryville/Crtr/InputProxy.cs
+++ b/Assets/Cryville/Crtr/InputProxy.cs
@@ -102,10 +102,13 @@ namespace Cryville.Crtr {
 		#region Handling
 		public void Activate() { foreach (var src in _sproxies.Keys) src.Handler.Activate(); }
 		public void Deactivate() { foreach (var src in _sproxies.Keys) src.Handler.Deactivate(); }
+		readonly object _lock = new object();
 		void OnInput(InputIdentifier id, InputVector vec) {
-			InputProxyEntry proxy;
-			if (_sproxies.TryGetValue(id.Source, out proxy)) {
-				OnInput(id, vec, proxy.Target);
+			lock (_lock) {
+				InputProxyEntry proxy;
+				if (_sproxies.TryGetValue(id.Source, out proxy)) {
+					OnInput(id, vec, proxy.Target);
+				}
 			}
 		}
 		static readonly int _var_value = IdentifierManager.SharedInstance.Request("value");