diff --git a/README.txt b/README.txt
index db020f0..6907d92 100644
--- a/README.txt
+++ b/README.txt
@@ -3,14 +3,16 @@ teleports
 
 Mod "teleports" for Minetest 0.4.17 or later.
 
-Allows players to create teleports with crafting.
+Allows players to create teleports with crafting (8 diamonds + 1 obsidian).
 
 A teleport is a block that teleports players to another nearby teleport (less than 260 blocks distance)
 by standing on it.
 The teleport will target the teleport (in range) that best matches your viewing direction.
 
-If you use (rightclick or double-tap) a teleport, you can spend mossy cobblestone to instantly teleport
-to one of the 6 nearest teleports.
+If you 'use' a teleport (rightclick or double-tap),  you can spend mossy cobblestone to
+instantly teleport to one of the 6 nearest teleports.
+
+Beware: If you dig a teleport, you only get 1 diamond back, so think before placing!
 
 Credits:
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