diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index feb64d65fbfb93cc38e142edcd9b682af502ff0d..3fd8f0e169e72a85eb388cdc537a79dd423c319f 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1602,6 +1602,7 @@ static long dm_compat_ctl_ioctl(struct file *file, uint command, ulong u)
 #endif
 
 static const struct file_operations _ctl_fops = {
+	.open = nonseekable_open,
 	.unlocked_ioctl	 = dm_ctl_ioctl,
 	.compat_ioctl = dm_compat_ctl_ioctl,
 	.owner	 = THIS_MODULE,