diff --git a/Xext/xselinux_hooks.c b/Xext/xselinux_hooks.c
index 55fd54a5b..d0ddf22e6 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>