diff --git a/meson.build b/meson.build
index a5d2a94..62e69e6 100644
--- a/meson.build
+++ b/meson.build
@@ -95,7 +95,7 @@ if get_option('udev_rules')
 
     if udev_rules_dir == 'auto'
         udev_dep = dependency('udev')
-        udev_rules_dir = udev_dep.get_pkgconfig_variable('udevdir') + 'rules.d'
+        udev_rules_dir = udev_dep.get_pkgconfig_variable('udevdir') + '/rules.d'
     endif
 endif