diff --git a/include/sys/statvfs.h b/include/sys/statvfs.h
index e0839ecac3266a40f3fcd33bc059fa77038a6e1e..ef07d6846a120513f60e6a1ac88092f2a07de0bb 100644
--- a/include/sys/statvfs.h
+++ b/include/sys/statvfs.h
@@ -42,6 +42,7 @@ int fstatvfs (int, struct statvfs *);
 #define ST_IMMUTABLE   512
 #define ST_NOATIME     1024
 #define ST_NODIRATIME  2048
+#define ST_RELATIME    4096
 
 #if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)
 #define statvfs64 statvfs