diff --git a/lib/node.js b/lib/node.js
index 14ec16b..37b00b6 100644
--- a/lib/node.js
+++ b/lib/node.js
@@ -46,12 +46,14 @@ class Node extends EventEmitter {
 
 		const mappings = await upnp.mappings();
 
-		const alreadyMapped = mappings.filter(mapping => {
+		const matchingMappings = mappings.filter(mapping => {
 			return mapping.description === this.name
-		}).length > 0;
+		});
+		const alreadyMapped = matchingMappings.length > 0;
 
 		if(alreadyMapped) {
 			console.log('already mapped!');
+			this.port = matchingMappings[0].public.port;
 			return;
 		}