diff --git a/README.md b/README.md
index ace3127f9aa6cc17f2f49c2bd91b8a07602851d2..094b6bf7c4ab1b84a19db91f324cbbc2ff487fd5 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ The `configure` script setup the environment :
 ./configure
 ```
 
-> Note : the `configure` script have to be executed only once
+> Note : the `configure` script have to be executed only once. The script can take a few minutes to execute.
 
 ## Train the network