diff --git a/code/game/machinery/portagrav.dm b/code/game/machinery/portagrav.dm
index 27cf859f8d7..6f73f3c781a 100644
--- a/code/game/machinery/portagrav.dm
+++ b/code/game/machinery/portagrav.dm
@@ -88,7 +88,7 @@
 
 /obj/machinery/power/portagrav/update_icon_state()
 	. = ..()
-	icon_state = panel_open ? "[base_icon_state]-o" : base_icon_state
+	icon_state = panel_open ? "[base_icon_state]_o" : base_icon_state
 
 /obj/machinery/power/portagrav/screwdriver_act(mob/living/user, obj/item/tool)
 	return default_deconstruction_screwdriver(user, tool)