diff --git a/conf/i3/config b/conf/i3/config
index 056b4979..bc25ed4a 100644
--- a/conf/i3/config
+++ b/conf/i3/config
@@ -8,7 +8,7 @@
 #
 # Flatpaks expected: org.gajim.Gajim org.gajim.Gajim.Plugin.omemo
 #
-# Debian theming: lxappearance gtk-chtheme qt4-qtconfig
+# Debian theming: lxappearance gtk-chtheme qt4-qtconfig qt5ct
 # https://askubuntu.com/a/600946
 #
 # HIDPI text scaling:
diff --git a/rc/xprofile b/rc/xprofile
index 68cb2ea0..cce544e1 100644
--- a/rc/xprofile
+++ b/rc/xprofile
@@ -1,3 +1,4 @@
 export XMODIFIERS=@im=fcitx
 export GTK_IM_MODULE="fcitx"
 export QT_IM_MODULE="fcitx"
+export QT_QPA_PLATFORMTHEME="qt5ct"