diff --git a/configs/sim/README.txt b/configs/sim/README.txt
index 321fbda2b80..d6ac28b22b9 100644
--- a/configs/sim/README.txt
+++ b/configs/sim/README.txt
@@ -324,6 +324,9 @@ SMP
   be called from CPU1 and it will try to restart NSH on CPU0 and, again,
   the same problem occurs.
 
+  2016-02-18:  There is an initial implementation based on signals and
+  signal handling, but this is not yet functional.
+
 BASIC
 ^^^^^