diff --git a/unifi.go b/unifi.go
index f00a385..3739b0e 100644
--- a/unifi.go
+++ b/unifi.go
@@ -133,39 +133,41 @@ func processUnifiAPI(s int) ([]node, []link, error) {
 
 		// INFLUX STOP
 		//log.Println(currentDevice.Mac)
-		nodes = append(nodes, node{
-			Firstseen:      "0",
-			Lastseen:       time.Unix(int64(currentDevice.LastSeen), 0).Format(iso8601),
-			IsOnline:       itob(currentDevice.State),
-			IsGateway:      false,
-			Clients:        clients,
-			ClientsWifi24:  0,
-			ClientsWifi5:   0,
-			ClientsOther:   clients,
-			RootFSUsage:    0,
-			LoadAVG:        load / 100,
-			MemoryUsage:    mem / 100,
-			Uptime:         time.Now().Add(-1 * time.Second * time.Duration(currentDevice.Uptime)).Format(iso8601),
-			GatewayNexthop: currentJSONDevice.GatewayNexthop,
-			Gateway:        currentJSONDevice.Gateway,
-			Location:       &currentJSONDevice.Location,
-			NodeID:         strings.ReplaceAll(currentDevice.Mac, ":", ""),
-			MAC:            currentDevice.Mac,
-			Adresses:       []string{currentDevice.IP},
-			Domain:         currentJSONDevice.Domain,
-			Hostname:       "[Unifi] " + currentDevice.Name,
-			Owner:          "Freifunk Rhein-Sieg",
-			Firmware: firmware{
-				Base:    "Ubiquiti - Stock",
-				Release: currentDevice.Version,
-			},
-			Autoupdater: autoupdater{
-				Enabled: false,
-				Branch:  "stable",
-			},
-			NProc: 1,
-			Model: model,
-		})
+		if currentDevice.Mac != "" {
+			nodes = append(nodes, node{
+				Firstseen:      "0",
+				Lastseen:       time.Unix(int64(currentDevice.LastSeen), 0).Format(iso8601),
+				IsOnline:       itob(currentDevice.State),
+				IsGateway:      false,
+				Clients:        clients,
+				ClientsWifi24:  0,
+				ClientsWifi5:   0,
+				ClientsOther:   clients,
+				RootFSUsage:    0,
+				LoadAVG:        load / 100,
+				MemoryUsage:    mem / 100,
+				Uptime:         time.Now().Add(-1 * time.Second * time.Duration(currentDevice.Uptime)).Format(iso8601),
+				GatewayNexthop: currentJSONDevice.GatewayNexthop,
+				Gateway:        currentJSONDevice.Gateway,
+				Location:       &currentJSONDevice.Location,
+				NodeID:         strings.ReplaceAll(currentDevice.Mac, ":", ""),
+				MAC:            currentDevice.Mac,
+				Adresses:       []string{currentDevice.IP},
+				Domain:         currentJSONDevice.Domain,
+				Hostname:       "[Unifi] " + currentDevice.Name,
+				Owner:          "Freifunk Rhein-Sieg",
+				Firmware: firmware{
+					Base:    "Ubiquiti - Stock",
+					Release: currentDevice.Version,
+				},
+				Autoupdater: autoupdater{
+					Enabled: false,
+					Branch:  "stable",
+				},
+				NProc: 1,
+				Model: model,
+			})
+		}
 	}
 	return nodes, links, err
 }