diff --git a/libc/kernel/uapi/linux/ethtool.h b/libc/kernel/uapi/linux/ethtool.h
index 48b4544..334c788 100644
--- a/libc/kernel/uapi/linux/ethtool.h
+++ b/libc/kernel/uapi/linux/ethtool.h
@@ -270,6 +270,25 @@
   ETHTOOL_MODULE_POWER_MODE_LOW = 1,
   ETHTOOL_MODULE_POWER_MODE_HIGH,
 };
+enum ethtool_pse_types {
+  ETHTOOL_PSE_UNKNOWN = 1 << 0,
+  ETHTOOL_PSE_PODL = 1 << 1,
+  ETHTOOL_PSE_C33 = 1 << 2,
+};
+enum ethtool_c33_pse_admin_state {
+  ETHTOOL_C33_PSE_ADMIN_STATE_UNKNOWN = 1,
+  ETHTOOL_C33_PSE_ADMIN_STATE_DISABLED,
+  ETHTOOL_C33_PSE_ADMIN_STATE_ENABLED,
+};
+enum ethtool_c33_pse_pw_d_status {
+  ETHTOOL_C33_PSE_PW_D_STATUS_UNKNOWN = 1,
+  ETHTOOL_C33_PSE_PW_D_STATUS_DISABLED,
+  ETHTOOL_C33_PSE_PW_D_STATUS_SEARCHING,
+  ETHTOOL_C33_PSE_PW_D_STATUS_DELIVERING,
+  ETHTOOL_C33_PSE_PW_D_STATUS_TEST,
+  ETHTOOL_C33_PSE_PW_D_STATUS_FAULT,
+  ETHTOOL_C33_PSE_PW_D_STATUS_OTHERFAULT,
+};
 enum ethtool_podl_pse_admin_state {
   ETHTOOL_PODL_PSE_ADMIN_STATE_UNKNOWN = 1,
   ETHTOOL_PODL_PSE_ADMIN_STATE_DISABLED,