diff --git a/src/Laskutin/Email.hs b/src/Laskutin/Email.hs
index 9d9fcaf..413f469 100644
--- a/src/Laskutin/Email.hs
+++ b/src/Laskutin/Email.hs
@@ -41,7 +41,7 @@ sendEmail sendmail email = do
 
 renderInvoice :: Bool -> Invoice -> Maybe (Text, Text)
 renderInvoice isReminder invoice@Invoice {rows, reference, account, recipient, due, subject, message, paid}
-  | invoiceSum invoice <= 0 = Nothing
+  | invoiceSum invoice <= 0 && isReminder = Nothing
   | otherwise = Just $ (subjectPrefix <> " – " <> subject,) $
         (if isReminder then "Muistutus alla olevan laskun maksamisesta. Jos olet juuri maksanut kyseisen laskun, tämä muistutus on aiheeton.\n\n" else mempty)
         <> (if T.null message then mempty else (message <> "\n\n\n"))