diff --git a/src/secmod_eddsa.ml b/src/secmod_eddsa.ml
index 71b28d06..6bf84922 100644
--- a/src/secmod_eddsa.ml
+++ b/src/secmod_eddsa.ml
@@ -1,6 +1,6 @@
 (* TODO
    ! use lock
-   ! Scanf not thread-safe, replace with Angstrom(?)
+   !? Scanf not thread-safe
    schedule tasks
    sign: check timestamps before signing *)
 (* IMPROVE