diff --git a/lib/InterfaceUtils.sh b/lib/InterfaceUtils.sh
index 1ae01cf..5b67446 100644
--- a/lib/InterfaceUtils.sh
+++ b/lib/InterfaceUtils.sh
@@ -42,6 +42,8 @@ function interface_physical() {
 	if [ -d "$interface_physical_path" ]; then
 		if [ -r "$interface_physical_path/name" ]
 		then InterfacePhysical="`cat "$interface_physical_path/name"`"
+		fi
+		if [ ! "${InterfacePhysical// }" ]; then
 		else InterfacePhysical="`ls -l "$interface_physical_path" | sed 's/^.*\/\([a-zA-Z0-9_-]*\)$/\1/'`"
 		fi
 	fi