diff --git a/src/main/java/com/dqu/simplerauth/mixin/ServerPlayNetworkHandlerMixin.java b/src/main/java/com/dqu/simplerauth/mixin/ServerPlayNetworkHandlerMixin.java
index 1fab475..ec6d60d 100644
--- a/src/main/java/com/dqu/simplerauth/mixin/ServerPlayNetworkHandlerMixin.java
+++ b/src/main/java/com/dqu/simplerauth/mixin/ServerPlayNetworkHandlerMixin.java
@@ -47,7 +47,7 @@ public void onPlayerAction(PlayerActionC2SPacket packet, CallbackInfo ci) {
                 This action only gets triggered when dropping from the main hand
              */
             ItemStack stack = player.getStackInHand(Hand.MAIN_HAND);
-            Packet packet1 = new ScreenHandlerSlotUpdateS2CPacket(-2, player.inventory.getSlotWithStack(stack), stack);
+            Packet packet1 = new ScreenHandlerSlotUpdateS2CPacket(-2, player.inventory.method_7371(stack), stack);
             networkHandler.sendPacket(packet1);
         } else {
             /*