diff --git a/meson.build b/meson.build
index 3ba0aaf40c..ffeeaa3f32 100644
--- a/meson.build
+++ b/meson.build
@@ -8,7 +8,6 @@ project('xserver', 'c',
 )
 release_date = '2025-12-21'
 
-add_project_arguments('-DHAVE_DIX_CONFIG_H', language: ['c', 'objc'])
 cc = meson.get_compiler('c')
 
 add_project_arguments('-fno-strict-aliasing', language : 'c')