diff --git a/gnu/packages/messaging.scm b/gnu/packages/messaging.scm
index 6e6bde31bc..4147d56de6 100644
--- a/gnu/packages/messaging.scm
+++ b/gnu/packages/messaging.scm
@@ -946,6 +946,7 @@ (define-public python-nbxmpp
      `(("glib" ,glib)
        ("glib-networking" ,glib-networking)
        ("libsoup" ,libsoup)
+       ("python-gssapi" ,python-gssapi)
        ("python-idna" ,python-idna)
        ("python-precis-i18n" ,python-precis-i18n)
        ("python-pygobject" ,python-pygobject)))