diff --git a/lib/internal/process/per_thread.js b/lib/internal/process/per_thread.js
index 952abda8b67147..ad634b757eca48 100644
--- a/lib/internal/process/per_thread.js
+++ b/lib/internal/process/per_thread.js
@@ -85,7 +85,7 @@ function setupCpuUsage(_cpuUsage) {
   // Ensure that a previously passed in value is valid. Currently, the native
   // implementation always returns numbers <= Number.MAX_SAFE_INTEGER.
   function previousValueIsValid(num) {
-    return Number.isFinite(num) &&
+    return typeof num === 'number' &&
         num <= Number.MAX_SAFE_INTEGER &&
         num >= 0;
   }