diff --git a/Assets/Scripts/PickUpKeyCard.cs b/Assets/Scripts/PickUpKeyCard.cs
index 1ecdbe91..b2fed543 100644
--- a/Assets/Scripts/PickUpKeyCard.cs
+++ b/Assets/Scripts/PickUpKeyCard.cs
@@ -46,6 +46,24 @@ public class PickUpKeyCard : MonoBehaviour
 
                     if (Input.GetMouseButtonDown(0))
                     {
+                        bool hasSpace = false;
+                        foreach (var slot in playerInventory.slots)
+                        {
+                            if (slot == null)
+                            {
+                                hasSpace = true;
+                                break;
+                            }
+                        }
+
+                        if (!hasSpace)
+                        {
+                            Debug.Log("Inventory is full!");
+                            if (interactionPrompt != null)
+                                interactionPrompt.text = "Inventory full!";
+                            return;
+                        }
+
                         isPickedUp = true;
 
                         if (keyCardPlayer != null)