diff --git a/man/waybar-custom.5.scd b/man/waybar-custom.5.scd
index a427be3..0ae7f4c 100644
--- a/man/waybar-custom.5.scd
+++ b/man/waybar-custom.5.scd
@@ -59,6 +59,10 @@ Addressed by *custom/<name>*
 	typeof: string ++
 	Command to execute when clicked on the module.
 
+*on-click-middle*: ++
+	typeof: string ++
+	Command to execute when middle-clicked on the module using mousewheel.
+
 *on-click-right*: ++
 	typeof: string ++
 	Command to execute when you right clicked on the module.