diff --git a/k/fd.c b/k/fd.c
index 63c7396..5aae201 100644
--- a/k/fd.c
+++ b/k/fd.c
@@ -1,6 +1,6 @@
 #include "fd.h"
 
-static struct file_entry fd_table[MAX_FD] = { 0 };
+struct file_entry fd_table[MAX_FD] = { 0 };
 
 static int find_next_fd(void)
 {
@@ -13,14 +13,13 @@ static int find_next_fd(void)
     return -1;
 }
 
-int register_fd(u32 lba, u32 file_size)
+int register_fd(u32 lba, u32 file_size, u8 is_dir)
 {
     int free_fd = find_next_fd();
     if (free_fd < 0)
         return -1;
 
-    struct file_entry f = { .open = 0, .lba = lba, .file_offset = 0,
-        .file_size = file_size };
+    struct file_entry f = { 0, lba, 0, file_size, is_dir };
     fd_table[free_fd] = f;
     return free_fd;
 }
diff --git a/k/fd.h b/k/fd.h
index be1db1a..cc2d022 100644
--- a/k/fd.h
+++ b/k/fd.h
@@ -11,9 +11,12 @@ struct file_entry
     u32 lba;
     u32 file_offset;
     u32 file_size;
+    u8 is_dir;
 };
 
-int register_fd(u32 lba, u32 file_size);
+extern struct file_entry fd_table[MAX_FD];
+
+int register_fd(u32 lba, u32 file_size, u8 is_dir);
 int destroy_fd(int fd);
 
 #endif /* !FD_H */