---
 lib/random_dev_urandom.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/random_dev_urandom.h b/lib/random_dev_urandom.h
index d9cf767..22c45b9 100644
--- a/lib/random_dev_urandom.h
+++ b/lib/random_dev_urandom.h
@@ -29,6 +29,10 @@
    USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
+#ifndef O_CLOEXEC
+# define O_CLOEXEC     02000000
+#endif
+
 #if ! defined(RANDOM_DEV_URANDOM_H)
 #  define RANDOM_DEV_URANDOM_H 1
 
-- 
2.34.1