diff --git a/include/taskschd.idl b/include/taskschd.idl
index d5577555e56..6c5e5533934 100644
--- a/include/taskschd.idl
+++ b/include/taskschd.idl
@@ -407,6 +407,18 @@ interface IDailyTrigger : ITrigger
     [propput] HRESULT RandomDelay([in] BSTR randomDelay);
 }
 
+[
+    uuid(4c8fec3a-c218-4e0c-b23d-629024db91a2),
+    oleautomation,
+    dual,
+    nonextensible
+]
+interface IRegistrationTrigger : ITrigger
+{
+    [propget] HRESULT Delay([out, retval] BSTR *pDelay);
+    [propput] HRESULT Delay([in] BSTR delay);
+}
+
 [
     object,
     oleautomation,