diff --git a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/BackpackListener.java b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/BackpackListener.java
index 6107a9ad10..77bbd088ee 100644
--- a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/BackpackListener.java
+++ b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/BackpackListener.java
@@ -160,6 +160,10 @@ private void openBackpack(Player p, ItemStack item, PlayerProfile profile, int s
                     Slimefun.getLocalization().sendMessage(p, "backpack.not-original-item", true);
                     return;
                 }
+                if (item.getAmount() > 1) {
+                    Slimefun.getLocalization().sendMessage(p, "backpack.no-stack", true);
+                    return;
+                }
                 PlayerBackpack.bindItem(
                         item,
                         Slimefun.getDatabaseManager()