diff --git a/TODO b/TODO
index 1053d8ef88f2957606d9a7ebcf838be9402a7419..cb309c161ad3c0c8f6afcd629f667bbdf90e63e4 100644
--- a/TODO
+++ b/TODO
@@ -13,6 +13,7 @@ Version 1.5.0:
 * Distributed clocks:
     - Check 32/64 bit operations.
     - Use vendor correction factors when calculating transmission delays.
+    - Use SYNC1 generation.
 * Fix unloading problem of ec_e100 driver.
 * Use ec_datagram_zero() where possible.
 * Fix arguments of reg_read.