diff --git a/lib/os.js b/lib/os.js
index 422ba6d0c2133b..24c9eab90d6e9e 100644
--- a/lib/os.js
+++ b/lib/os.js
@@ -89,7 +89,8 @@ function loadavg() {
 }
 
 function cpus() {
-  const data = getCPUs();
+  // [] is a bugfix for a regression introduced in 51cea61
+  const data = getCPUs() || [];
   const result = [];
   for (var i = 0; i < data.length; i += 7) {
     result.push({