diff --git a/gnu/packages/mail.scm b/gnu/packages/mail.scm
index f670a63ee7..978b22333e 100644
--- a/gnu/packages/mail.scm
+++ b/gnu/packages/mail.scm
@@ -110,7 +110,9 @@
   #:use-module (gnu packages xorg)
   #:use-module (gnu packages docbook)
   #:use-module ((guix licenses)
-                #:select (fdl1.1+ gpl2 gpl2+ gpl3 gpl3+ lgpl2.1 lgpl2.1+ lgpl3+
+                #:select (fdl1.1+
+                           agpl3+
+                           gpl2 gpl2+ gpl3 gpl3+ lgpl2.1 lgpl2.1+ lgpl3+
                            non-copyleft (expat . license:expat) bsd-3
                            public-domain bsd-4 isc (openssl . license:openssl)
                            bsd-2 x11-style agpl3 asl2.0 perl-license))