diff --git a/modules/services/swayidle.nix b/modules/services/swayidle.nix
index b28de6f0..80317e42 100644
--- a/modules/services/swayidle.nix
+++ b/modules/services/swayidle.nix
@@ -118,6 +118,7 @@ in {
       Unit = {
         Description = "Idle manager for Wayland";
         Documentation = "man:swayidle(1)";
+        ConditionEnvironment = "WAYLAND_DISPLAY";
         PartOf = [ "graphical-session.target" ];
       };