diff --git a/Xext/xace.c b/Xext/xace.c
index 44aaa421d..14a5e7963 100644
--- a/Xext/xace.c
+++ b/Xext/xace.c
@@ -17,6 +17,10 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 ********************************************************/
 
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
 #include <stdarg.h>
 #include "windowstr.h"
 #include "scrnintstr.h"