diff --git a/util/iana_ports.inc b/util/iana_ports.inc
index 54c01c313..07956a67d 100644
--- a/util/iana_ports.inc
+++ b/util/iana_ports.inc
@@ -3177,7 +3177,6 @@
 3562,
 3563,
 3564,
-3566,
 3567,
 3568,
 3569,