diff --git a/lib/std/os/linux.zig b/lib/std/os/linux.zig
index 1df5882df1bfcfa7cb05a8f7e9599d3abdd4c948..365fb9f05f6bd736450fecb5983e83709478f5f7 100644
--- a/lib/std/os/linux.zig
+++ b/lib/std/os/linux.zig
@@ -4722,6 +4722,9 @@ pub const TIMERFD_CLOCK = timerfd_clockid_t;
 pub const timerfd_clockid_t = enum(u32) {
     REALTIME = 0,
     MONOTONIC = 1,
+    BOOTTIME = 7,
+    REALTIME_ALARM = 8,
+    BOOTTIME_ALARM = 9,
     _,
 };