diff --git a/fish/.config/fish/conf.d/setup.fish b/fish/.config/fish/conf.d/setup.fish
index 2f20f4c..062da71 100644
--- a/fish/.config/fish/conf.d/setup.fish
+++ b/fish/.config/fish/conf.d/setup.fish
@@ -5,6 +5,19 @@ function __fish_setup_on_tty_login --description "Set up environment on tty logi
   set -qx XDG_STATE_HOME; or set -Ux XDG_STATE_HOME $HOME/.local/state
   set -qx SSH_AUTH_SOCK; or set -Ux SSH_AUTH_SOCK $XDG_RUNTIME_DIR/ssh-agent.socket
 
+  # Wayland session
+  set -qx XDG_SESSION_TYPE; or set -Ux XDG_SESSION_TYPE wayland
+  set -qx XDG_SESSION_DESKTOP; or set -Ux XDG_SESSION_DESKTOP wayland
+  set -qx XDG_CURRENT_DESKTOP; or set -Ux XDG_CURRENT_DESKTOP wayland
+
+  # Firefox
+  set -qx MOZ_ENABLE_WAYLAND; or set -Ux MOZ_ENABLE_WAYLAND 1
+  set -qx MOZ_DBUS_REMOTE; or set -Ux MOZ_DBUS_REMOTE 1
+
+  # QT
+  set -qx QT_QPA_PLATFORM; or set -Ux QT_QPA_PLATFORM wayland
+  set -qx QT_QPA_PLATFORMTHEME; or set -Ux QT_QPA_PLATFORMTHEME qt5ct
+
   for extra_path in ~/.{local,nix-profile,cargo,cabal,ghcup}/bin
     if test -d "$extra_path"
       set -gxp PATH "$extra_path"