diff --git a/pharaoh.gd b/pharaoh.gd
index 7e93de6..28be541 100644
--- a/pharaoh.gd
+++ b/pharaoh.gd
@@ -26,7 +26,7 @@ func _on_interacted() -> void:
 	print("Loaded up disk ", wanted_disk)
 
 	wanted_disk = disks_wanted.front()
-	if %Player2D.has_disk(wanted_disk):
+	if wanted_disk and %Player2D.has_disk(wanted_disk):
 		return
 
 	%Player2D.give_objective("disk%d" % wanted_disk, "Locate data disk %d" % wanted_disk)