diff --git a/linux-game-manager.sh b/linux-game-manager.sh
index 8f86370..1b9a846 100755
--- a/linux-game-manager.sh
+++ b/linux-game-manager.sh
@@ -518,8 +518,7 @@ case "${game}" in
             if command -v yay &> /dev/null ; then
                 yay -Sy --noconfirm --sudoloop freedoom gzdoom
             elif command -v slapt-get &> /dev/null ; then
-                su -c slapt-get -i gzdoom
-                su -c slapt-get -i freedoom
+                su -c 'slapt-get -i freedoom gzdoom'
             else
                 dialog --backtitle "Linux Game Manager" --msgbox "No supported package managers found. Please install the freedoom and gzdoom packages manually." -1 -1
                 exit 0