diff --git a/libc/include/netinet/if_ether.h b/libc/include/netinet/if_ether.h
index 700b9db..e4317fa 100644
--- a/libc/include/netinet/if_ether.h
+++ b/libc/include/netinet/if_ether.h
@@ -25,6 +25,8 @@
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
+
+#include <sys/socket.h>
 #include <linux/if_ether.h>
 #include <linux/if_arp.h>
 #ifndef ETHER_ADDR_LEN