diff --git a/include/hydrolink/protocol.h b/include/hydrolink/protocol.h
index 3d54cf0..40e57ef 100644
--- a/include/hydrolink/protocol.h
+++ b/include/hydrolink/protocol.h
@@ -8,6 +8,8 @@
 #define HYDROLINK_MAX_PAYLOAD_LEN 6
 #define HYDROLINK_MAX_MSG_LEN (HYDROLINK_MAX_PAYLOAD_LEN + HYDROLINK_NON_PAYLOAD_LEN)
 
+#define HYDROLINK_MSG_CRCS {73, 58, 250, 38, 28}
+
 struct hydrolink_msg_s;
 
 typedef struct hydrolink_msg_s hydrolink_msg_t;