diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 3a8cd3dfb51c..e184b44b1011 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -35,6 +35,7 @@
 #include "linux/genhd.h"
 #include "linux/spinlock.h"
 #include "linux/platform_device.h"
+#include "linux/scatterlist.h"
 #include "asm/segment.h"
 #include "asm/uaccess.h"
 #include "asm/irq.h"
@@ -704,6 +705,7 @@ static int ubd_add(int n, char **error_out)
 	ubd_dev->size = ROUND_BLOCK(ubd_dev->size);
 
 	INIT_LIST_HEAD(&ubd_dev->restart);
+	sg_init_table(&ubd_dev->sg, MAX_SG);
 
 	err = -ENOMEM;
 	ubd_dev->queue = blk_init_queue(do_ubd_request, &ubd_dev->lock);