diff --git a/libc-test/build.rs b/libc-test/build.rs
index e941baf0560787415ea9f0d5d2b2e3b101f601bf..81137d8e44e1da2ae811e3f0ed3184b50ca336df 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -1703,6 +1703,7 @@ fn test_freebsd(target: &str) {
                 "sys/times.h",
                 "sys/timex.h",
                 "sys/types.h",
+                "sys/ucontext.h",
                 "sys/uio.h",
                 "sys/un.h",
                 "sys/utsname.h",