diff --git a/lib/filesystem.js b/lib/filesystem.js
index 624cd3d..35df0be 100644
--- a/lib/filesystem.js
+++ b/lib/filesystem.js
@@ -87,7 +87,7 @@ function fsSize(callback) {
           const used = parseInt(((_linux || _freebsd || _openbsd || _netbsd) ? line[3] : line[2])) * 1024;
           const available = parseInt(((_linux || _freebsd || _openbsd || _netbsd) ? line[4] : line[3])) * 1024;
           const use = parseFloat((100.0 * (used / (used + available))).toFixed(2));
-          let rw = _darwin && osMounts && Object.keys(osMounts).length > 0 ? osMounts[fs] || false : null;
+          let rw = osMounts && Object.keys(osMounts).length > 0 ? osMounts[fs] || false : null;
           line.splice(0, (_linux || _freebsd || _openbsd || _netbsd) ? 6 : 5);
           const mount = line.join(' ');
           if (!data.find(el => (el.fs === fs && el.type === fsType))) {