diff --git a/drivers/staging/hv/ChannelMgmt.h b/drivers/staging/hv/ChannelMgmt.h
index 2782328..fa973d8 100644
--- a/drivers/staging/hv/ChannelMgmt.h
+++ b/drivers/staging/hv/ChannelMgmt.h
@@ -26,6 +26,7 @@
 #define _CHANNEL_MGMT_H_
 
 #include <linux/list.h>
+#include <linux/timer.h>
 #include "RingBuffer.h"
 #include "VmbusChannelInterface.h"
 #include "VmbusPacketFormat.h"
diff --git a/drivers/staging/hv/osd.h b/drivers/staging/hv/osd.h
index 9504604..ce064e8 100644
--- a/drivers/staging/hv/osd.h
+++ b/drivers/staging/hv/osd.h
@@ -25,6 +25,7 @@
 #ifndef _OSD_H_
 #define _OSD_H_
 
+#include <linux/workqueue.h>
 
 /* Defines */
 #define ALIGN_UP(value, align)	(((value) & (align-1)) ?		\