diff --git a/include/fat.h b/include/fat.h
index f1b4a0d..cc85b06 100644
--- a/include/fat.h
+++ b/include/fat.h
@@ -208,6 +208,8 @@
 int file_cd(const char *path);
 int file_fat_detectfs(void);
 int file_fat_ls(const char *dir);
+long file_fat_read_at(const char *filename, unsigned long pos, void *buffer,
+		      unsigned long maxsize);
 long file_fat_read(const char *filename, void *buffer, unsigned long maxsize);
 const char *file_getfsname(int idx);
 int fat_register_device(block_dev_desc_t *dev_desc, int part_no);