diff --git a/check-certificates.rsc b/check-certificates.rsc
index ad16f802..6ed82b44 100644
--- a/check-certificates.rsc
+++ b/check-certificates.rsc
@@ -60,7 +60,7 @@
               http-header-field=({ [ $FetchUserAgentStr $ScriptName ] }) \
               ($CertRenewUrl . $CertFileName) dst-path=$CertFileName as-value;
         } do={
-          :if ($Err != "Fetch failed with status 404") do={
+          :if (!($Err ~ "[Ss]tatus 404")) do={
             $LogPrint warning $0 ("Failed fetching certificate: " . $Err);
           }
           :error false;