diff --git a/meson.build b/meson.build
index 55e7edb..7bcf6ef 100644
--- a/meson.build
+++ b/meson.build
@@ -89,7 +89,7 @@
 )
 
 systemd_system_unit_dir = dependency('systemd').get_variable(
-    'systemdsystemunitdir',
+    'systemd_system_unit_dir',
     pkgconfig_define: ['prefix', get_option('prefix')],
 )
 udev_dir = dependency('udev').get_variable(