diff --git a/ChangeLog.txt b/ChangeLog.txt
index eb854d6c1..817b97803 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -621,5 +621,6 @@
 * CNxServer: Remove NX server task.  Now calls nx_start (indirectly through
   boardctrl(BOARDIOC_NX_START) to start the NX Server kernel thread
   (2016-12-01).
+* CNxServer: Can't use printf in this context (2016-12-01)