diff --git a/scripts/upgrade b/scripts/upgrade
index adad1a9..9af2636 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -100,7 +100,7 @@ then
 
 	# Launch netdata installation in /opt directory
 	pushd $NETDATA_TMPDIR
-		./netdata-installer.sh --install /opt --dont-wait --disable-cloud  >&3 2>&3 || ynh_die "FAILED TO COMPILE/INSTALL NETDATA"
+		./netdata-installer.sh --install-prefix /opt --dont-wait --disable-cloud  >&3 2>&3 || ynh_die "FAILED TO COMPILE/INSTALL NETDATA"
 	popd
     
 	# close fd 3