diff --git a/libc/kernel/uapi/linux/mii.h b/libc/kernel/uapi/linux/mii.h
index 5c87990..3c6c564 100644
--- a/libc/kernel/uapi/linux/mii.h
+++ b/libc/kernel/uapi/linux/mii.h
@@ -113,6 +113,8 @@
 #define EXPANSION_NPCAPABLE 0x0008
 #define EXPANSION_MFAULTS 0x0010
 #define EXPANSION_RESV 0xffe0
+#define ESTATUS_1000_XFULL 0x8000
+#define ESTATUS_1000_XHALF 0x4000
 #define ESTATUS_1000_TFULL 0x2000
 #define ESTATUS_1000_THALF 0x1000
 #define NWAYTEST_RESV1 0x00ff