diff --git a/etc/kamailio.cfg b/etc/kamailio.cfg
index be71dbb54a0..c349fcf65c8 100644
--- a/etc/kamailio.cfg
+++ b/etc/kamailio.cfg
@@ -615,7 +615,7 @@ route[REQINIT] {
 		}
 	}
 #!endif
-	if($ua =~ "friendly|scanner|sipcli|sipvicious|VaxSIPUserAgent") {
+	if($ua =~ "friendly|scanner|sipcli|sipvicious|VaxSIPUserAgent|pplsip") {
 		# silent drop for scanners - uncomment next line if want to reply
 		# sl_send_reply("200", "OK");
 		exit;