diff --git a/transport/serialbridge/meson.build b/transport/serialbridge/meson.build
index 6919c75..36339b7 100644
--- a/transport/serialbridge/meson.build
+++ b/transport/serialbridge/meson.build
@@ -32,7 +32,7 @@
         output: 'serialbridge@.service',
         configuration: conf_data,
         install: true,
-        install_dir: systemd.get_variable(pkgconfig: 'systemdsystemunitdir'),
+        install_dir: systemd.get_variable(pkgconfig: 'systemd_system_unit_dir'),
     )
 endif