diff --git a/config/known-clients.json b/config/known-clients.json
index f5bca20..67c535d 100644
--- a/config/known-clients.json
+++ b/config/known-clients.json
@@ -25,7 +25,7 @@
 	},
 	{"n": "Ecosia Browser",
 	 "id": "ecosia",
-	 "rx": [ "\\(Ecosia ios@(\\d+)\\." ]
+	 "rx": [ "\\(Ecosia \\w+@(\\d+)\\." ]
 	},
 	{"n": "Silk",
 	 "id": "silk",
diff --git a/script.js b/script.js
index b6e1592..54465b5 100644
--- a/script.js
+++ b/script.js
@@ -95,7 +95,9 @@ const BotMon = {
 
 		/* helper to convert an ip address string to a normalised format: */
 		_ip2Num: function(ip) {
-			if (ip.indexOf(':') > 0) { /* IP6 */
+			if (!ip) {
+				return 'null';
+			} else if (ip.indexOf(':') > 0) { /* IP6 */
 				return (ip.split(':').map(d => ('0000'+d).slice(-4) ).join(''));
 			} else { /* IP4 */
 				return Number(ip.split('.').map(d => ('000'+d).slice(-3) ).join(''));