--- a/block.c	2016-07-13 10:17:47.000000000 +0300
+++ b/block.c	2016-07-13 13:14:09.563177519 +0300
@@ -36,6 +36,10 @@
 
 #include "libblkid-tiny/libblkid-tiny.h"
 
+#ifndef MNT_DETACH
+#define MNT_DETACH      0x00000002
+#endif
+
 #define ERROR(fmt, ...) do { \
 		syslog(LOG_ERR, fmt, ## __VA_ARGS__); \
 		fprintf(stderr, "block: "fmt, ## __VA_ARGS__); \
--- a/backend/jffs2.c	2016-07-13 10:17:47.000000000 +0300
+++ b/backend/jffs2.c	2016-07-13 13:15:15.947176786 +0300
@@ -32,6 +32,10 @@
 
 #define SWITCH_JFFS2 "/tmp/.switch_jffs2"
 
+#ifndef MNT_DETACH
+#define MNT_DETACH      0x00000002
+#endif
+
 void
 foreachdir(const char *dir, int (*cb)(const char*))
 {