diff --git a/meson.build b/meson.build
index 3ac77a5..d9412c6 100644
--- a/meson.build
+++ b/meson.build
@@ -28,7 +28,9 @@
 gpiodcxx = dependency('libgpiodcxx', default_options: ['bindings=cxx'])
 
 systemd = dependency('systemd', required: true)
-systemd_system_unit_dir = systemd.get_variable(pkgconfig: 'systemdsystemunitdir')
+systemd_system_unit_dir = systemd.get_variable(
+    pkgconfig: 'systemd_system_unit_dir',
+)
 
 boost = dependency(
     'boost',