diff --git a/TODO b/TODO
index 6778c9cf..79087057 100644
--- a/TODO
+++ b/TODO
@@ -11,6 +11,7 @@ Version 1.5.0:
 * Remove ecrt_domain_state().
 * Segmented Sdo downloads.
 * Overthink pointer return values.
+* Implement Sdo handlers in userspace library.
 
 Future issues: