diff --git a/dovecot/sieve/after.sieve b/dovecot/sieve/after.sieve
index 93632657..3026395b 100644
--- a/dovecot/sieve/after.sieve
+++ b/dovecot/sieve/after.sieve
@@ -1,5 +1,5 @@
 require ["fileinto", "envelope", "mailbox"];
 
-if header :contains "X-Spam-Flag" "YES" {
+if header :contains "X-Spam" "YES" {
   fileinto :create "Junk";
 }