diff --git a/libc-test/build.rs b/libc-test/build.rs
index 64101f48cfaa8..77d31b6699d32 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -2074,6 +2074,7 @@ fn test_freebsd(target: &str) {
                 "sys/sysctl.h",
                 "sys/thr.h",
                 "sys/time.h",
+                "sys/timerfd.h",
                 "sys/times.h",
                 "sys/timex.h",
                 "sys/types.h",