diff --git a/include/dirent.h b/include/dirent.h
index 23da8e06bb..e252fae12e 100644
--- a/include/dirent.h
+++ b/include/dirent.h
@@ -112,6 +112,7 @@
 
 struct dirent
 {
+  ino_t d_ino;                    /* file number */
   uint8_t  d_type;                /* Type of file */
   char     d_name[NAME_MAX + 1];  /* File name */
 };
diff --git a/include/nuttx/fs/hostfs.h b/include/nuttx/fs/hostfs.h
index fbf1e8bca1..88bed488ed 100644
--- a/include/nuttx/fs/hostfs.h
+++ b/include/nuttx/fs/hostfs.h
@@ -152,6 +152,7 @@ struct nuttx_timespec
 
 struct nuttx_dirent_s
 {
+  ino_t d_ino;                              /* file number */
   uint8_t      d_type;                      /* type of file */
   char         d_name[CONFIG_NAME_MAX + 1]; /* filename */
 };