diff --git a/cpld/meson.build b/cpld/meson.build
index 2ab8793..cb5c706 100644
--- a/cpld/meson.build
+++ b/cpld/meson.build
@@ -21,7 +21,7 @@
 )
 
 systemd_system_unit_dir = dependency('systemd').get_variable(
-    'systemdsystemunitdir',
+    'systemd_system_unit_dir',
     pkgconfig_define: ['prefix', get_option('prefix')],
 )