Add release note for #1859

diff --git a/doc/notes/notes-9.16.4.rst b/doc/notes/notes-9.16.4.rst
index 4377146b703f826da6563d01fb9b9cf06586e80f..4b7955a769a4c521a846fba07c24885c9c915760 100644 (file)
--- a/doc/notes/notes-9.16.4.rst
+++ b/doc/notes/notes-9.16.4.rst
@@ -77,6 +77,9 @@ Bug Fixes
    database node was looked up while the database was being modified.
    [GL #1857]
 
+-  A possible deadlock in ``lib/isc/unix/socket.c`` was fixed.
+   [GL #1859]
+
 -  Missing mutex and conditional destruction in netmgr code leads to a memory
    leak on BSD systems. [GL #1893].