diff --git a/fs/hpfs/buffer.c b/fs/hpfs/buffer.c
index b52b738..b6fca54 100644
--- a/fs/hpfs/buffer.c
+++ b/fs/hpfs/buffer.c
@@ -5,7 +5,7 @@
  *
  *  general buffer i/o
  */
-
+#include <linux/sched.h>
 #include "hpfs_fn.h"
 
 void hpfs_lock_creation(struct super_block *s)
diff --git a/fs/hpfs/namei.c b/fs/hpfs/namei.c
index 9953cf9..d256559 100644
--- a/fs/hpfs/namei.c
+++ b/fs/hpfs/namei.c
@@ -5,7 +5,7 @@
  *
  *  adding & removing files & directories
  */
-
+#include <linux/sched.h>
 #include "hpfs_fn.h"
 
 static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index fca1165d..29cc34a 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -12,6 +12,7 @@
 #include <linux/init.h>
 #include <linux/statfs.h>
 #include <linux/magic.h>
+#include <linux/sched.h>
 
 /* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */