diff --git a/nixos/modules/services/x11/desktop-managers/plasma5.nix b/nixos/modules/services/x11/desktop-managers/plasma5.nix
index e8a62ea7576a..69907cb53108 100644
--- a/nixos/modules/services/x11/desktop-managers/plasma5.nix
+++ b/nixos/modules/services/x11/desktop-managers/plasma5.nix
@@ -200,6 +200,10 @@ in
       ];
 
       services.xserver.displayManager.sessionPackages = [ pkgs.libsForQt5.plasma5.plasma-workspace ];
+      # Default to be `plasma` (X11) instead of `plasmawayland`, since plasma wayland currently has
+      # many tiny bugs.
+      # See: https://github.com/NixOS/nixpkgs/issues/143272
+      services.xserver.displayManager.defaultSession = mkDefault "plasma";
 
       security.wrappers = {
         kcheckpass =