diff --git a/composite/compositeext.h b/composite/compositeext.h
index 945a4c35c..e3e6f4c75 100644
--- a/composite/compositeext.h
+++ b/composite/compositeext.h
@@ -20,11 +20,6 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
 #ifndef _COMPOSITEEXT_H_
 #define _COMPOSITEEXT_H_
 
diff --git a/config/config-backends.h b/config/config-backends.h
index cb09ef5be..06928731f 100644
--- a/config/config-backends.h
+++ b/config/config-backends.h
@@ -22,13 +22,9 @@
  *
  * Author: Daniel Stone <daniel@fooishbar.org>
  */
-
 #ifndef XSERVER_CONFIG_BACKENDS_H
 #define XSERVER_CONFIG_BACKENDS_H
 
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
 #include "input.h"
 #include "list.h"
 
diff --git a/dbe/midbe.h b/dbe/midbe.h
index 019375756..037d7891f 100644
--- a/dbe/midbe.h
+++ b/dbe/midbe.h
@@ -28,11 +28,6 @@
  *     Header file for users of machine-independent DBE code
  *
  *****************************************************************************/
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
 #ifndef MIDBE_H
 #define MIDBE_H
 
diff --git a/fb/fbpict.h b/fb/fbpict.h
index eb627c15f..a35765b9c 100644
--- a/fb/fbpict.h
+++ b/fb/fbpict.h
@@ -20,11 +20,6 @@
  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  * PERFORMANCE OF THIS SOFTWARE.
  */
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
 #ifndef _FBPICT_H_
 #define _FBPICT_H_
 
diff --git a/glx/glxdrawable.h b/glx/glxdrawable.h
index 441d72dd7..35a11aaf0 100644
--- a/glx/glxdrawable.h
+++ b/glx/glxdrawable.h
@@ -1,7 +1,3 @@
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
 #ifndef _GLX_drawable_h_
 #define _GLX_drawable_h_
 
diff --git a/glx/glxserver.h b/glx/glxserver.h
index 79f4944d0..4c82e28d2 100644
--- a/glx/glxserver.h
+++ b/glx/glxserver.h
@@ -1,7 +1,3 @@
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
 #ifndef _GLX_server_h_
 #define _GLX_server_h_
 
diff --git a/glx/unpack.h b/glx/unpack.h
index 256073470..01994a3cc 100644
--- a/glx/unpack.h
+++ b/glx/unpack.h
@@ -1,7 +1,3 @@
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
 #ifndef __GLX_unpack_h__
 #define __GLX_unpack_h__
 
diff --git a/include/inpututils.h b/include/inpututils.h
index 49b1c1074..111718df8 100644
--- a/include/inpututils.h
+++ b/include/inpututils.h
@@ -21,11 +21,6 @@
  * DEALINGS IN THE SOFTWARE.
  *
  */
-
-#ifdef HAVE_DIX_CONFIG_H
-#include "dix-config.h"
-#endif
-
 #ifndef INPUTUTILS_H
 #define INPUTUTILS_H
 
diff --git a/include/vidmodestr.h b/include/vidmodestr.h
index b47daa779..5aad26830 100644
--- a/include/vidmodestr.h
+++ b/include/vidmodestr.h
@@ -1,7 +1,3 @@
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
 #ifndef _VIDMODEPROC_H_
 #define _VIDMODEPROC_H_
 
diff --git a/meson.build b/meson.build
index 1b901c65b..bb5756a94 100644
--- a/meson.build
+++ b/meson.build
@@ -8,7 +8,6 @@ project('xserver', 'c',
 )
 release_date = '2025-07-04'
 
-add_project_arguments('-DHAVE_DIX_CONFIG_H', language: ['c', 'objc'])
 cc = meson.get_compiler('c')
 
 add_project_arguments('-fno-strict-aliasing', language : 'c')
diff --git a/mi/mivalidate.h b/mi/mivalidate.h
index 4c64ab34e..1b423f85c 100644
--- a/mi/mivalidate.h
+++ b/mi/mivalidate.h
@@ -26,10 +26,6 @@ from The Open Group.
 
 */
 
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
 #ifndef MIVALIDATE_H
 #define MIVALIDATE_H
 
diff --git a/miext/rootless/rootlessWindow.h b/miext/rootless/rootlessWindow.h
index 00e95b8a0..877e1fddb 100644
--- a/miext/rootless/rootlessWindow.h
+++ b/miext/rootless/rootlessWindow.h
@@ -26,11 +26,6 @@
  * holders shall not be used in advertising or otherwise to promote the sale,
  * use or other dealings in this Software without prior written authorization.
  */
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
 #ifndef _ROOTLESSWINDOW_H
 #define _ROOTLESSWINDOW_H
 
diff --git a/xfixes/xfixesint.h b/xfixes/xfixesint.h
index 6e606d00a..2de511dbc 100644
--- a/xfixes/xfixesint.h
+++ b/xfixes/xfixesint.h
@@ -41,11 +41,6 @@
  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  * PERFORMANCE OF THIS SOFTWARE.
  */
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
 #ifndef _XFIXESINT_H_
 #define _XFIXESINT_H_