diff --git a/core.lua b/core.lua
index e01f5f7..4ac7440 100644
--- a/core.lua
+++ b/core.lua
@@ -1,5 +1,5 @@
 Aux = {
-    version = '2.9.19',
+    version = '2.9.20',
     blizzard_ui_shown = false,
 	orig = {},
 }
diff --git a/stack.lua b/stack.lua
index 7f3861d..e53dbb0 100644
--- a/stack.lua
+++ b/stack.lua
@@ -45,8 +45,8 @@ function private.find_empty_slot()
 end
 
 function private.find_charge_item_slot()
-	for slot in private.item_slots(state.item_key) do
-		if private.charges(slot) == state.target_size then
+	for slot in Aux.util.inventory() do
+		if private.matching_item(slot) and private.charges(slot) == state.target_size then
 			return slot
 		end
 	end