diff --git a/src/recur2.cpp b/src/recur2.cpp
index 498d719bc..1e7297fd7 100644
--- a/src/recur2.cpp
+++ b/src/recur2.cpp
@@ -47,6 +47,10 @@ static Task upgradeTask (const Task&)
 {
   Task upgraded;
 
+  // TODO Convert 'mask' to 'last' <-- length (mask)
+  // TODO Convert 'parent' to 'template'.
+  // TODO Convert 'imask' to 'index'.
+  // TODO Add 'rtype:periodic'.
   return upgraded;
 }