diff --git a/mx-linux/mx-21.sh b/mx-linux/mx-21.sh
index dd3eeb9..830ca7b 100644
--- a/mx-linux/mx-21.sh
+++ b/mx-linux/mx-21.sh
@@ -13,6 +13,7 @@ apt-get install $1 gir1.2-handy-1
 
 #<-- TLP – Linux Advanced Power Management 
 apt-get install $1 tlp tlpui tlp-rdw
+apt-get install $1 powertop
 #--> TLP
 
 apt-get install $1 net-tools