diff --git a/modules/services/wlsunset.nix b/modules/services/wlsunset.nix
index 8b1d7201c..8ffb3665b 100644
--- a/modules/services/wlsunset.nix
+++ b/modules/services/wlsunset.nix
@@ -131,6 +131,7 @@ in
         Description = "Day/night gamma adjustments for Wayland compositors.";
         After = [ cfg.systemdTarget ];
         PartOf = [ cfg.systemdTarget ];
+        ConditionEnvironment = "WAYLAND_DISPLAY";
       };
 
       Service = {
diff --git a/tests/modules/services/wlsunset/wlsunset-service-expected.service b/tests/modules/services/wlsunset/wlsunset-service-expected.service
index 1ea58c19b..3bcf17c85 100644
--- a/tests/modules/services/wlsunset/wlsunset-service-expected.service
+++ b/tests/modules/services/wlsunset/wlsunset-service-expected.service
@@ -6,5 +6,6 @@ ExecStart=@wlsunset@/bin/wlsunset -L128.8 -T6000 -g0.6 -l12.3 -t3500
 
 [Unit]
 After=test.target
+ConditionEnvironment=WAYLAND_DISPLAY
 Description=Day/night gamma adjustments for Wayland compositors.
 PartOf=test.target