diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index 75b2b763f1ba..534e6650e2aa 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -13,6 +13,7 @@
 #include <linux/mutex.h>
 #include <linux/serial.h>
 #include <linux/kfifo.h>
+#include <linux/usb.h>
 
 /* The maximum number of ports one device can grab at once */
 #define MAX_NUM_PORTS		16