diff --git a/code/game/objects/structures/watercloset.dm b/code/game/objects/structures/watercloset.dm
index 67f52c36204..a2c3f481bb5 100644
--- a/code/game/objects/structures/watercloset.dm
+++ b/code/game/objects/structures/watercloset.dm
@@ -103,6 +103,7 @@
 			user.visible_message(span_notice("[user] [cistern ? "replaces the lid on the cistern" : "lifts the lid off the cistern"]!"), span_notice("You [cistern ? "replace the lid on the cistern" : "lift the lid off the cistern"]!"), span_hear("You hear grinding porcelain."))
 			cistern = !cistern
 			update_appearance()
+		return COMPONENT_CANCEL_ATTACK_CHAIN
 	else if(I.tool_behaviour == TOOL_WRENCH && !(flags_1&NODECONSTRUCT_1))
 		I.play_tool_sound(src)
 		deconstruct()