diff --git a/pkgs/applications/networking/mailreaders/claws-mail/default.nix b/pkgs/applications/networking/mailreaders/claws-mail/default.nix
index 34361e1dab9a..42f29574eef3 100644
--- a/pkgs/applications/networking/mailreaders/claws-mail/default.nix
+++ b/pkgs/applications/networking/mailreaders/claws-mail/default.nix
@@ -2,7 +2,7 @@
 , curl, dbus, dbus-glib, enchant, gtk2, gnutls, gnupg, gpgme, hicolor-icon-theme
 , libarchive, libcanberra-gtk2, libetpan, libnotify, libsoup, libxml2, networkmanager
 , openldap, perl, pkgconfig, poppler, python, shared-mime-info, webkitgtk24x-gtk2
-, glib-networking, gsettings-desktop-schemas, libSM, libytnef
+, glib-networking, gsettings-desktop-schemas, libSM, libytnef, libical 
 # Build options
 # TODO: A flag to build the manual.
 # TODO: Plugins that complain about their missing dependencies, even when
@@ -69,7 +69,8 @@ stdenv.mkDerivation rec {
     ++ optional enableNetworkManager networkmanager
     ++ optional enableLdap openldap
     ++ optional enablePluginPdf poppler
-    ++ optional enablePluginFancy webkitgtk24x-gtk2;
+    ++ optional enablePluginFancy webkitgtk24x-gtk2
+    ++ optional enablePluginVcalendar libical;
 
   configureFlags =
     optional (!enableLdap) "--disable-ldap"