diff --git a/README.md b/README.md
index 989c901d7173e8c2ce24a35dad95fdd8ffb02bb6..50c313e08edbacfbacb9915aea0afd4fe431b634 100644
--- a/README.md
+++ b/README.md
@@ -66,7 +66,7 @@ This part of the package rely on Geant4 to perform Monte Carlo simulation. You n
 ````
 $ NPS
 $ cmake ./
-$ make -jn
+$ make -jn install
 `````
 
 This will produce the npsimulation executable. For a detail list of the available input flag and their meaning, you can run: