diff --git a/code/modules/mob/living/silicon/robot/robot_ui_module.dm b/code/modules/mob/living/silicon/robot/robot_ui_module.dm
index 6037834bf14..435c5241460 100644
--- a/code/modules/mob/living/silicon/robot/robot_ui_module.dm
+++ b/code/modules/mob/living/silicon/robot/robot_ui_module.dm
@@ -10,7 +10,9 @@
 
 
 /datum/tgui_module/robot_ui_module/ui_assets(mob/user)
-	. += get_asset_datum(/datum/asset/spritesheet/robot_icons)
+	return list(
+		get_asset_datum(/datum/asset/spritesheet/robot_icons)
+	)
 
 /datum/tgui_module/robot_ui_module/tgui_static_data()
 	var/list/data = ..()