diff --git a/controle_cotisation/main.py b/controle_cotisation/main.py
index 5d3a9a1..23ffd7b 100755
--- a/controle_cotisation/main.py
+++ b/controle_cotisation/main.py
@@ -257,7 +257,7 @@ def renotify_unpaid(member):
     mailheaders = get_file_content_all(MODALITY_MAIL_HEADERS) + "\n"
     mailheaders = mailheaders.replace("ANNEE_CIVILE", year)
     mailheaders = mailheaders.replace("COURRIEL-COTISANT", email)
-    mailheaders = mailheaders.replaces("Modalit", "Rappel_:_modalit")
+    mailheaders = mailheaders.replace("Modalit", "Rappel_:_modalit")
 
     sendmail(mailheaders, mailtext)