diff --git a/include/linux/can.h b/include/linux/can.h
index 4af39b08..f7a810de 100644
--- a/include/linux/can.h
+++ b/include/linux/can.h
@@ -196,5 +196,6 @@ struct can_filter {
 };
 
 #define CAN_INV_FILTER 0x20000000U /* to be set in can_filter.can_id */
+#define CAN_RAW_FILTER_MAX 512 /* maximum number of can_filter set via setsockopt() */
 
 #endif /* !_UAPI_CAN_H */