diff --git a/fs/internal.h b/fs/internal.h
index 7c5f01c..d208937 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -126,6 +126,7 @@
  * dcache.c
  */
 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
+extern int d_set_mounted(struct dentry *dentry);
 
 /*
  * read_write.c