diff --git a/glx/extension_string.c b/glx/extension_string.c
index a5b8c747e..e5ba59028 100644
--- a/glx/extension_string.c
+++ b/glx/extension_string.c
@@ -31,7 +31,8 @@
  * \author Ian Romanick <idr@us.ibm.com>
  */
 
-#include "dix-config.h"
+#include <dix-config.h>
+
 #include "extension_string.h"
 #include "opaque.h"
 
diff --git a/glx/indirect_size_get.c b/glx/indirect_size_get.c
index ab04e1a51..d00f9f1ff 100644
--- a/glx/indirect_size_get.c
+++ b/glx/indirect_size_get.c
@@ -22,7 +22,7 @@
  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-
+#include <dix-config.h>
 
 #include <X11/Xfuncproto.h>
 #include <GL/gl.h>
diff --git a/glx/vndext.c b/glx/vndext.c
index 106526913..513e317bd 100644
--- a/glx/vndext.c
+++ b/glx/vndext.c
@@ -26,6 +26,7 @@
  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  * MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
  */
+#include <dix-config.h>
 
 #include "vndserver_priv.h"
 
diff --git a/glx/vndservermapping.c b/glx/vndservermapping.c
index 1a76e52a8..b55a5f32e 100644
--- a/glx/vndservermapping.c
+++ b/glx/vndservermapping.c
@@ -26,6 +26,7 @@
  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  * MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
  */
+#include <dix-config.h>
 
 #include "vndserver_priv.h"
 
diff --git a/glx/vndservervendor.c b/glx/vndservervendor.c
index bd86c67f7..e2e7d194e 100644
--- a/glx/vndservervendor.c
+++ b/glx/vndservervendor.c
@@ -26,6 +26,7 @@
  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  * MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
  */
+#include <dix-config.h>
 
 #include "vndservervendor.h"