diff --git a/TODO b/TODO
index 153f1a62..920a6359 100644
--- a/TODO
+++ b/TODO
@@ -16,6 +16,10 @@ Version 1.5.0:
     - Skip setting system time offset when application detached.
     - How to set the SYNC1 shift time?
     - Do not output graph, if topology calculation failed.
+    - Set the "Cyclic Generation Start Time" based on the slave's
+      "System Time" register instead of using the application time.
+    - Check if register 0x0980 is working, to avoid clearing it when
+      configuring.
 * Fix unloading problem of ec_e100 driver.
 * Use ec_datagram_zero() where possible.
 * Fix arguments of reg_read.