diff --git a/lib/system.js b/lib/system.js
index ea933f1..77382dd 100644
--- a/lib/system.js
+++ b/lib/system.js
@@ -122,7 +122,7 @@ function system(callback) {
           }
           if (!result.uuid && (_freebsd || _openbsd || _netbsd)) {
             try {
-              const disksById = execSync('sysctl -i kern.hostid kern.hostuuid', util.execOptsLinux).toString();
+              const lines = execSync('sysctl -i kern.hostid', util.execOptsLinux).toString().split('\n');
               result.uuid = util.getValue(lines, 'kern.hostid', ':').toLowerCase();
             } catch (e) {
               util.noop();