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-rw-r--r--include/linux/usb/cdc.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/usb/cdc.h b/include/linux/usb/cdc.h
index 94ee4ecf0564..71e52f2f6a38 100644
--- a/include/linux/usb/cdc.h
+++ b/include/linux/usb/cdc.h
@@ -6,6 +6,9 @@
* firmware based USB peripherals.
*/
+#ifndef __LINUX_USB_CDC_H
+#define __LINUX_USB_CDC_H
+
#define USB_CDC_SUBCLASS_ACM 0x02
#define USB_CDC_SUBCLASS_ETHERNET 0x06
#define USB_CDC_SUBCLASS_WHCM 0x08
@@ -221,3 +224,4 @@ struct usb_cdc_notification {
__le16 wLength;
} __attribute__ ((packed));
+#endif /* __LINUX_USB_CDC_H */