diff --git a/nixos/modules/services/x11/display-managers/default.nix b/nixos/modules/services/x11/display-managers/default.nix
index 5d49ca943872..428ca191fd8f 100644
--- a/nixos/modules/services/x11/display-managers/default.nix
+++ b/nixos/modules/services/x11/display-managers/default.nix
@@ -412,6 +412,9 @@ in
             (dm: wm: let
               sessionName = "${dm.name}${optionalString (wm.name != "none") ("+" + wm.name)}";
               script = xsession dm wm;
+              desktopNames = if dm ? desktopNames
+                             then concatStringsSep ";" dm.desktopNames
+                             else sessionName;
             in
               optional (dm.name != "none" || wm.name != "none")
                 (pkgs.writeTextFile {
@@ -427,7 +430,7 @@ in
                     TryExec=${script}
                     Exec=${script}
                     Name=${sessionName}
-                    DesktopNames=${sessionName}
+                    DesktopNames=${desktopNames}
                   '';
                 } // {
                   providedSessions = [ sessionName ];