diff --git a/profile/endpoints/endpoint-asn.go b/profile/endpoints/endpoint-asn.go
index fd5b11dc..898d9bfc 100644
--- a/profile/endpoints/endpoint-asn.go
+++ b/profile/endpoints/endpoint-asn.go
@@ -9,7 +9,7 @@ import (
 	"github.com/safing/portmaster/intel"
 )
 
-var asnRegex = regexp.MustCompile("^(AS)?[0-9]+$")
+var asnRegex = regexp.MustCompile("^AS[0-9]+$")
 
 // EndpointASN matches ASNs.
 type EndpointASN struct {