diff --git a/dom0.sh b/dom0.sh
index b808faa..2cc7a18 100644
--- a/dom0.sh
+++ b/dom0.sh
@@ -32,4 +32,4 @@ gtk-application-prefer-dark-theme=1' | sudo tee /etc/gtk-4.0/settings.ini
 
 sudo qubes-dom0-update qubes-ctap-dom0 qt5ct qt5-qtstyleplugins
 
-echo 'QT_QPA_PLATFORMTHEME=qt5ct' | sudo tee /etc/environment
+echo 'QT_QPA_PLATFORMTHEME=qt5ct' | sudo tee -a /etc/environment