diff --git a/docs/api/tray.md b/docs/api/tray.md
index 7d6ebc96713a..a25fd6cbbfe9 100644
--- a/docs/api/tray.md
+++ b/docs/api/tray.md
@@ -82,7 +82,7 @@ This is only implmented on OS X.
 
 ### Tray.setHighlightMode(highlight)
 
-* `highlight` String
+* `highlight` Boolean
 
 Sets whether the tray icon is highlighted when it is clicked.