diff --git a/scripts/base/protocols/smtp/dpd.sig b/scripts/base/protocols/smtp/dpd.sig
index 49ed7ea3be..6fbde59059 100644
--- a/scripts/base/protocols/smtp/dpd.sig
+++ b/scripts/base/protocols/smtp/dpd.sig
@@ -10,3 +10,4 @@ signature dpd_smtp_server {
   ip-proto == tcp
   payload /^[[:space:]]*220[[:space:]-]/
   tcp-state responder
+}
\ No newline at end of file