diff --git a/nixos/modules/programs/sway.nix b/nixos/modules/programs/sway.nix
index f92d09a7ef4..9a15c773463 100644
--- a/nixos/modules/programs/sway.nix
+++ b/nixos/modules/programs/sway.nix
@@ -87,6 +87,8 @@ in {
     hardware.opengl.enable = mkDefault true;
     fonts.enableDefaultFonts = mkDefault true;
     programs.dconf.enable = mkDefault true;
+    # To make a Sway session available if a display manager like SDDM is enabled:
+    services.xserver.displayManager.extraSessionFilePackages = [ swayJoined ];
   };
 
   meta.maintainers = with lib.maintainers; [ gnidorah primeos colemickens ];