diff --git a/cpu.md b/cpu.md
index 5cafceb..4994e1d 100644
--- a/cpu.md
+++ b/cpu.md
@@ -11,7 +11,7 @@ Variable | Meaning | Type | Default
 `timeout` | Refresh timeout seconds | int | 10
 `settings` | User settings | function | empty function
 
-`settings` can be fed with `usage`, which is the cpu use percentage.
+`settings` can be fed with the string `usage`, which means the cpu use percentage.
 
 ### output