--- a/src/main/radtest.in
+++ b/src/main/radtest.in
@@ -112,7 +112,7 @@ if [ "$7" ]
 then
 	nas=$7
 else
-	nas=`(hostname || uname -n) 2>/dev/null | sed 1q`
+	nas=$(cat /proc/sys/kernel/hostname)
 fi
 
 (