diff --git a/drivers/mailbox/bcm-flexrm-mailbox.c b/drivers/mailbox/bcm-flexrm-mailbox.c
index 41f79e51d9e5..5d278bb5a4c0 100644
--- a/drivers/mailbox/bcm-flexrm-mailbox.c
+++ b/drivers/mailbox/bcm-flexrm-mailbox.c
@@ -26,7 +26,6 @@
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/mailbox_controller.h>
-#include <linux/mailbox_client.h>
 #include <linux/mailbox/brcm-message.h>
 #include <linux/module.h>
 #include <linux/msi.h>
diff --git a/drivers/mailbox/cv1800-mailbox.c b/drivers/mailbox/cv1800-mailbox.c
index 4761191acf78..4bca9d8be4ba 100644
--- a/drivers/mailbox/cv1800-mailbox.c
+++ b/drivers/mailbox/cv1800-mailbox.c
@@ -11,7 +11,6 @@
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/kfifo.h>
-#include <linux/mailbox_client.h>
 #include <linux/mailbox_controller.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
diff --git a/drivers/mailbox/omap-mailbox.c b/drivers/mailbox/omap-mailbox.c
index 17fe6545875d..d9f100c18895 100644
--- a/drivers/mailbox/omap-mailbox.c
+++ b/drivers/mailbox/omap-mailbox.c
@@ -21,7 +21,6 @@
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/mailbox_controller.h>
-#include <linux/mailbox_client.h>
 
 #include "mailbox.h"