diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 622aece1acc..c8a4332d113 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -23,6 +23,7 @@
 #include <linux/swap.h>
 #include <linux/kthread.h>
 #include <linux/freezer.h>
+#include <linux/delay.h>
 
 struct virtio_balloon
 {