diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/idlenotifier/IdleNotifier.java b/runelite-client/src/main/java/net/runelite/client/plugins/idlenotifier/IdleNotifier.java
index a2365dd91f..54b6c6f393 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/idlenotifier/IdleNotifier.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/idlenotifier/IdleNotifier.java
@@ -110,6 +110,7 @@ public class IdleNotifier extends Plugin
 			/* Smithing(Anvil, Furnace, Cannonballs */
 			case SMITHING_ANVIL:
 			case SMITHING_SMELTING:
+			case SMITHING_CANNONBALL:
 			/* Fishing */
 			case FISHING_NET:
 			case FISHING_HARPOON: