diff --git a/files/generic/ethinfo b/files/generic/ethinfo
index 68f2917..4d3ff4b 100755
--- a/files/generic/ethinfo
+++ b/files/generic/ethinfo
@@ -12,7 +12,7 @@ for ifname, stat in pairs(util.ubus("network.device", "status")) do
 
                 status = stat.carrier and "yes" or "no"
 
-                if stat.speed:sub(1, 1) == "-" then
+                if stat.speed == nil or stat.speed:sub(1, 1) == "-" then
                         speed = "-"
                 else
                         speed = stat.speed:sub(1, -2) .. "Mb/s"