diff --git a/libunicode.h b/libunicode.h
index 5b02c82..c2fdeac 100644
--- a/libunicode.h
+++ b/libunicode.h
@@ -26,6 +26,11 @@
 
 #include <stdint.h>
 
+/* unicode standard version */
+#define LIBUNICODE_UNICODE_VERSION_MAJOR 17
+#define LIBUNICODE_UNICODE_VERSION_MINOR 0
+#define LIBUNICODE_UNICODE_VERSION_PATCH 0
+
 /* define it to include all the unicode tables (40KB larger) */
 #define CONFIG_ALL_UNICODE