diff --git a/src/tree.h b/src/tree.h
index eb0fd71..135bcad 100644
--- a/src/tree.h
+++ b/src/tree.h
@@ -237,7 +237,8 @@
     LY_VALUE_SCHEMA,          /**< YANG schema value, prefixes map to YANG import prefixes */
     LY_VALUE_SCHEMA_RESOLVED, /**< resolved YANG schema value, prefixes map to module structures directly */
     LY_VALUE_XML,             /**< XML data value, prefixes map to XML namespace prefixes */
-    LY_VALUE_JSON             /**< JSON data value, prefixes map to module names */
+    LY_VALUE_JSON,            /**< JSON data value, prefixes map to module names */
+    LY_VALUE_LYB              /**< LYB data binary value, prefix mapping is type-specific (but usually like JSON) */
 } LY_VALUE_FORMAT;
 
 /** @} trees */