diff --git a/gnu/packages/messaging.scm b/gnu/packages/messaging.scm
index 8441e41351..4b22bdbd0b 100644
--- a/gnu/packages/messaging.scm
+++ b/gnu/packages/messaging.scm
@@ -1225,6 +1225,7 @@ of xmpppy.")
            python-css-parser
            python-dbus
            python-gssapi
+           python-idna
            python-keyring
            python-nbxmpp
            python-packaging