diff --git a/Xext/xselinux_hooks.c b/Xext/xselinux_hooks.c
index 57b24e452..52a71cf4f 100644
--- a/Xext/xselinux_hooks.c
+++ b/Xext/xselinux_hooks.c
@@ -26,6 +26,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <dix-config.h>
 #endif
 
+#include <errno.h>
 #include <sys/socket.h>
 #include <stdio.h>
 #include <stdarg.h>