diff --git a/libc/kernel/uapi/linux/dpll.h b/libc/kernel/uapi/linux/dpll.h
index cbefd15..dd692f6 100644
--- a/libc/kernel/uapi/linux/dpll.h
+++ b/libc/kernel/uapi/linux/dpll.h
@@ -22,6 +22,14 @@
   __DPLL_LOCK_STATUS_MAX,
   DPLL_LOCK_STATUS_MAX = (__DPLL_LOCK_STATUS_MAX - 1)
 };
+enum dpll_lock_status_error {
+  DPLL_LOCK_STATUS_ERROR_NONE = 1,
+  DPLL_LOCK_STATUS_ERROR_UNDEFINED,
+  DPLL_LOCK_STATUS_ERROR_MEDIA_DOWN,
+  DPLL_LOCK_STATUS_ERROR_FRACTIONAL_FREQUENCY_OFFSET_TOO_HIGH,
+  __DPLL_LOCK_STATUS_ERROR_MAX,
+  DPLL_LOCK_STATUS_ERROR_MAX = (__DPLL_LOCK_STATUS_ERROR_MAX - 1)
+};
 #define DPLL_TEMP_DIVIDER 1000
 enum dpll_type {
   DPLL_TYPE_PPS = 1,
@@ -71,6 +79,7 @@
   DPLL_A_LOCK_STATUS,
   DPLL_A_TEMP,
   DPLL_A_TYPE,
+  DPLL_A_LOCK_STATUS_ERROR,
   __DPLL_A_MAX,
   DPLL_A_MAX = (__DPLL_A_MAX - 1)
 };