diff --git a/src/libbpf.c b/src/libbpf.c
index 53dc7b4..d7d8f78 100644
--- a/src/libbpf.c
+++ b/src/libbpf.c
@@ -1664,6 +1664,10 @@ static int sys_memfd_create(const char *name, unsigned flags)
 	return syscall(__NR_memfd_create, name, flags);
 }
 
+#ifndef MFD_CLOEXEC
+#define MFD_CLOEXEC 0x0001U
+#endif
+
 static int create_placeholder_fd(void)
 {
 	int fd;