diff --git a/admin/setup.php b/admin/setup.php
index 81b5097..42c53fe 100644
--- a/admin/setup.php
+++ b/admin/setup.php
@@ -166,6 +166,11 @@ else
     {
         print '<br>'.$langs->trans("NothingToSetup");
     }
+
+    // Display a notice if the 'cron' module is not enabled
+    if (! in_array('cron', $conf->modules, true)) {
+        print '<div class="info"><p>' . $langs->trans('NoticeCronIsDisabled') . "</p></div>\n";
+    }
 }
 
 
diff --git a/langs/en_US/sendrecurringinvoicebymail.lang b/langs/en_US/sendrecurringinvoicebymail.lang
index 86f7180..dc9d28f 100644
--- a/langs/en_US/sendrecurringinvoicebymail.lang
+++ b/langs/en_US/sendrecurringinvoicebymail.lang
@@ -28,6 +28,7 @@ ModulesendrecurringinvoicebymailDesc = Send FactureRec generated invoices by mai
 sendrecurringinvoicebymailSetup = sendrecurringinvoicebymail setup
 Settings = Settings
 sendrecurringinvoicebymailSetupPage = sendrecurringinvoicebymail setup page
+NoticeCronIsDisabled = Notice: the cron / Scheduled Jobs module seems disabled. Unless you know what you are doing, invoices won't be generated and emails won't be sent.
 SENDRECURRINGINVOICEBYMAIL_BODY_ISHTML_DEFAULT = Default mail body's format
 SENDRECURRINGINVOICEBYMAIL_BODY_ISHTML_DEFAULTTooltip = -1 for auto-detect, 0 for plaintext, 1 for HTML
 
diff --git a/langs/fr_FR/sendrecurringinvoicebymail.lang b/langs/fr_FR/sendrecurringinvoicebymail.lang
index c7475ca..cdd1af6 100644
--- a/langs/fr_FR/sendrecurringinvoicebymail.lang
+++ b/langs/fr_FR/sendrecurringinvoicebymail.lang
@@ -28,6 +28,7 @@ ModulesendrecurringinvoicebymailDesc = Envoi par mail des factures générées p
 sendrecurringinvoicebymailSetup = Configuration du module sendrecurringinvoicebymail
 Settings = Réglages
 sendrecurringinvoicebymailSetupPage = Page de configuration du module sendrecurringinvoicebymail
+NoticeCronIsDisabled = Notice : le module cron / Travaux Planifiés semble désactivé. Sauf cas particulier, les factures ne seront pas générées et les mails ne seront pas envoyés.
 SENDRECURRINGINVOICEBYMAIL_BODY_ISHTML_DEFAULT = Format par défaut du corps du mail
 SENDRECURRINGINVOICEBYMAIL_BODY_ISHTML_DEFAULTTooltip = -1: auto-détection, 0: texte pur, 1: HTML