diff --git a/Assets/Fungus/VisualScripting/FungusScript.cs b/Assets/Fungus/VisualScripting/FungusScript.cs
index cb8372ef..3e46189e 100644
--- a/Assets/Fungus/VisualScripting/FungusScript.cs
+++ b/Assets/Fungus/VisualScripting/FungusScript.cs
@@ -96,7 +96,8 @@ namespace Fungus.Script
 				bool collision = false;
 				foreach(FungusVariable variable in GetComponents<FungusVariable>())
 				{
-					if (variable == ignoreVariable)
+					if (variable == ignoreVariable ||
+					    variable.key == null)
 					{
 						continue;
 					}
diff --git a/Assets/Fungus/VisualScripting/FungusVariable.cs b/Assets/Fungus/VisualScripting/FungusVariable.cs
index b1989a82..65bc0d2c 100644
--- a/Assets/Fungus/VisualScripting/FungusVariable.cs
+++ b/Assets/Fungus/VisualScripting/FungusVariable.cs
@@ -21,6 +21,6 @@ namespace Fungus.Script
 	public class FungusVariable : MonoBehaviour
 	{
 		public VariableScope scope;
-		public string key;
+		public string key = "";
 	}
 }
diff --git a/Assets/Shuttle/ShuttleGame.unity b/Assets/Shuttle/ShuttleGame.unity
index e43a687f..7c2d54bc 100644
Binary files a/Assets/Shuttle/ShuttleGame.unity and b/Assets/Shuttle/ShuttleGame.unity differ