diff --git a/i2c-vr/meson.build b/i2c-vr/meson.build
index 2af9c56..13e1b37 100644
--- a/i2c-vr/meson.build
+++ b/i2c-vr/meson.build
@@ -25,7 +25,7 @@
 )
 
 systemd_system_unit_dir = dependency('systemd').get_variable(
-    'systemdsystemunitdir',
+    'systemd_system_unit_dir',
     pkgconfig_define: ['prefix', get_option('prefix')],
 )