diff --git a/drivers/usb/mtu3/mtu3_debug.h b/drivers/usb/mtu3/mtu3_debug.h
index fb6b28277c9b..3084c46017c3 100644
--- a/drivers/usb/mtu3/mtu3_debug.h
+++ b/drivers/usb/mtu3/mtu3_debug.h
@@ -12,6 +12,8 @@
 
 #include <linux/debugfs.h>
 
+struct ssusb_mtk;
+
 #define MTU3_DEBUGFS_NAME_LEN 32
 
 struct mtu3_regset {