diff --git a/fs/proc/base.c b/fs/proc/base.c
index cc6ea2329e71f4f086e4949a6fb46a94a5e3de56..beaa0ce3b82e1de8fec8941584a03f3dc32a700b 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -3082,7 +3082,7 @@ static int proc_task_readdir(struct file * filp, void * dirent, filldir_t filldi
 		goto out_no_task;
 	retval = 0;
 
-	switch (filp->f_pos) {
+	switch ((unsigned long)filp->f_pos) {
 	case 0:
 		ino = inode->i_ino;
 		if (filldir(dirent, ".", 1, filp->f_pos, ino, DT_DIR) < 0)