diff --git a/nt/primitives/bootstrap/nt.nix b/nt/primitives/bootstrap/nt.nix
index dbbc777..ed795c5 100644
--- a/nt/primitives/bootstrap/nt.nix
+++ b/nt/primitives/bootstrap/nt.nix
@@ -81,6 +81,7 @@ in rec {
     else typeSig x;
 
   ntTrapdoorKey = mkTrapdoorKey "nt";
+  ntDynamicTrapdoorKey = mkTrapdoorKey "ntDyn";
 
   enfIsPrimitive = type: value: msg: let
     got = typeOf value;