diff --git a/README.md b/README.md
index ba122dc05..b7df2afae 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,9 @@ Ethereum
 
 Ethereum Go (c) [0255c7881](https://github.com/ethereum/go-ethereum#copy)
 
+A fair warning; Ethereum is not yet to be used in production. There's no
+test-net and you aren't mining read blocks (just one which is the genesis block).
+
 
 Ethereum Go is split up in several sub packages. Please refer to each
 individual package for more information.