diff --git a/gnu/packages/messaging.scm b/gnu/packages/messaging.scm
index 4afc377913..afd9cebf4d 100644
--- a/gnu/packages/messaging.scm
+++ b/gnu/packages/messaging.scm
@@ -78,6 +78,7 @@ (define-module (gnu packages messaging)
   #:use-module (gnu packages guile)
   #:use-module (gnu packages icu4c)
   #:use-module (gnu packages image)
+  #:use-module (gnu packages kerberos)
   #:use-module (gnu packages less)
   #:use-module (gnu packages libcanberra)
   #:use-module (gnu packages libidn)
@@ -1909,6 +1910,7 @@ (define-public loudmouth
     (inputs
      `(("glib" ,glib)
        ("gnutls" ,gnutls)
+       ("krb5" ,mit-krb5)
        ("libidn" ,libidn)))
     (native-inputs
      `(("pkg-config" ,pkg-config)