diff --git a/modules/services/wlsunset.nix b/modules/services/wlsunset.nix
index 4bdc9a8f1..766602b55 100644
--- a/modules/services/wlsunset.nix
+++ b/modules/services/wlsunset.nix
@@ -134,7 +134,7 @@ in
       Service = {
         ExecStart =
           let
-            args = lib.cli.toGNUCommandLineShell { } {
+            args = lib.cli.toCommandLineShellGNU { } {
               t = cfg.temperature.night;
               T = cfg.temperature.day;
               g = cfg.gamma;
diff --git a/tests/modules/services/wlsunset/wlsunset-service-expected.service b/tests/modules/services/wlsunset/wlsunset-service-expected.service
index f89f36e1e..1ea58c19b 100644
--- a/tests/modules/services/wlsunset/wlsunset-service-expected.service
+++ b/tests/modules/services/wlsunset/wlsunset-service-expected.service
@@ -2,7 +2,7 @@
 WantedBy=test.target
 
 [Service]
-ExecStart=@wlsunset@/bin/wlsunset -L 128.8 -T 6000 -g 0.6 -l 12.3 -t 3500
+ExecStart=@wlsunset@/bin/wlsunset -L128.8 -T6000 -g0.6 -l12.3 -t3500
 
 [Unit]
 After=test.target