diff --git a/crypto/openssl/crypto/async/arch/async_posix.h b/crypto/openssl/crypto/async/arch/async_posix.h
index a17c6b8e68a..2ac99d6fea8 100644
--- a/crypto/openssl/crypto/async/arch/async_posix.h
+++ b/crypto/openssl/crypto/async/arch/async_posix.h
@@ -18,7 +18,7 @@
 # include <unistd.h>
 
 # if _POSIX_VERSION >= 200112L \
-     && (_POSIX_VERSION < 200809L || defined(__GLIBC__))
+     && (_POSIX_VERSION < 200809L || defined(__GLIBC__) || defined(__FreeBSD__))
 
 # include <pthread.h>