diff --git a/code/game/objects/items/grenades/grenade.dm b/code/game/objects/items/grenades/grenade.dm
index 033ea9e791..16a5e6d1d3 100644
--- a/code/game/objects/items/grenades/grenade.dm
+++ b/code/game/objects/items/grenades/grenade.dm
@@ -93,9 +93,8 @@
 		var/obj/item/I = loc
 		I.grenade_prime_react(src)
 
-
-/obj/item/grenade/attackby(obj/item/W, mob/user, params)
-	if(istype(W, /obj/item/screwdriver))
+/obj/item/grenade/tool_act(mob/living/user, obj/item/I, tool_behaviour)
+	if(tool_behaviour == TOOL_SCREWDRIVER)
 		switch(det_time)
 			if ("1")
 				det_time = 10