diff --git a/libc/include/sys/epoll.h b/libc/include/sys/epoll.h
index 625f4c2..1e207d8 100644
--- a/libc/include/sys/epoll.h
+++ b/libc/include/sys/epoll.h
@@ -25,10 +25,12 @@
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
+
 #ifndef _SYS_EPOLL_H_
 #define _SYS_EPOLL_H_
 
 #include <sys/cdefs.h>
+#include <sys/types.h>
 #include <asm/fcntl.h> /* For O_CLOEXEC. */
 
 __BEGIN_DECLS