diff --git a/docs/api/structures/cpu-usage.md b/docs/api/structures/cpu-usage.md
index b700d4945f0f..abb5e15c2f20 100644
--- a/docs/api/structures/cpu-usage.md
+++ b/docs/api/structures/cpu-usage.md
@@ -3,4 +3,5 @@
 * `percentCPUUsage` Number - Percentage of CPU used since the last call to getCPUUsage.
   First call returns 0.
 * `idleWakeupsPerSecond` Number - The number of average idle cpu wakeups per second
-  since the last call to getCPUUsage. First call returns 0.
+  since the last call to getCPUUsage. First call returns 0. Will always return 0 on
+  Windows.