diff --git a/src/web/server/common/dune b/src/web/server/common/dune
index 3324b582..50cf6c46 100644
--- a/src/web/server/common/dune
+++ b/src/web/server/common/dune
@@ -15,7 +15,7 @@
   gettext.base
   gettext.extension
   gettext-camomile
-  netstring)
+  sendmail)
  (modules_without_implementation
   web_i18n_sig
   web_services_sig