diff --git a/check-certificates b/check-certificates
index 4fd90fe..15e14ea 100644
--- a/check-certificates
+++ b/check-certificates
@@ -91,7 +91,7 @@
   }
 }
 
-:foreach Cert in=[ / certificate find where !revoked expires-after<2w ] do={
+:foreach Cert in=[ / certificate find where !revoked expires-after<2w fingerprint~"."] do={
   :local CertName [ / certificate get $Cert name ];
   :local CommonName [ / certificate get $Cert common-name ];
   :local FingerPrint [ / certificate get $Cert fingerprint ];