diff --git a/nixos/modules/services/x11/display-managers/lightdm.nix b/nixos/modules/services/x11/display-managers/lightdm.nix
index e1688c451045..567c3ac34549 100644
--- a/nixos/modules/services/x11/display-managers/lightdm.nix
+++ b/nixos/modules/services/x11/display-managers/lightdm.nix
@@ -196,7 +196,7 @@ in
       { assertion = cfg.autoLogin.enable -> dmDefault != "none" || wmDefault != "none";
         message = ''
           LightDM auto-login requires that services.xserver.desktopManager.default and
-          services.xserver.windowMananger.default are set to valid values. The current
+          services.xserver.windowManager.default are set to valid values. The current
           default session: ${defaultSessionName} is not valid.
         '';
       }
diff --git a/nixos/modules/services/x11/display-managers/sddm.nix b/nixos/modules/services/x11/display-managers/sddm.nix
index d5f98874b6ed..05830e325d51 100644
--- a/nixos/modules/services/x11/display-managers/sddm.nix
+++ b/nixos/modules/services/x11/display-managers/sddm.nix
@@ -203,7 +203,7 @@ in
       { assertion = cfg.autoLogin.enable -> elem defaultSessionName dmcfg.session.names;
         message = ''
           SDDM auto-login requires that services.xserver.desktopManager.default and
-          services.xserver.windowMananger.default are set to valid values. The current
+          services.xserver.windowManager.default are set to valid values. The current
           default session: ${defaultSessionName} is not valid.
         '';
       }