diff --git a/meson.build b/meson.build
index c66115d..0f4ad19 100644
--- a/meson.build
+++ b/meson.build
@@ -39,7 +39,7 @@
 boost_dep = dependency('boost')
 
 systemd_system_unit_dir = systemd.get_variable(
-    'systemdsystemunitdir',
+    'systemd_system_unit_dir',
     pkgconfig_define: ['prefix', get_option('prefix')],
 )