diff --git a/src/main/java/carpet/script/value/NullValue.java b/src/main/java/carpet/script/value/NullValue.java
index e2a1f3a7..7dcec512 100644
--- a/src/main/java/carpet/script/value/NullValue.java
+++ b/src/main/java/carpet/script/value/NullValue.java
@@ -40,6 +40,21 @@ public class NullValue extends NumericValue // TODO check nonsingleton code
         return o instanceof NullValue;
     }
 
+    @Override
+    public Value slice(long fromDesc, Long toDesc) {
+        return Value.NULL;
+    }
+
+    @Override
+    public NumericValue opposite() {
+        return Value.NULL;
+    }
+
+    @Override
+    public int length() {
+        return 0;
+    }
+
     @Override
     public int compareTo(Value o)
     {