diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c
index 5f7c3151d8c08..a2744cb64c6df 100644
--- a/drivers/vfio/vfio_main.c
+++ b/drivers/vfio/vfio_main.c
@@ -1146,6 +1146,7 @@ static long vfio_device_fops_unl_ioctl(struct file *filep,
 {
 	struct vfio_device_file *df = filep->private_data;
 	struct vfio_device *device = df->device;
+	void __user *uptr = (void __user *)arg;
 	int ret;
 
 	/* Paired with smp_store_release() following vfio_df_open() */
@@ -1158,7 +1159,7 @@ static long vfio_device_fops_unl_ioctl(struct file *filep,
 
 	switch (cmd) {
 	case VFIO_DEVICE_FEATURE:
-		ret = vfio_ioctl_device_feature(device, (void __user *)arg);
+		ret = vfio_ioctl_device_feature(device, uptr);
 		break;
 
 	default: