diff --git a/include/nlohmann/detail/view/node.hpp b/include/nlohmann/detail/view/node.hpp
index 471c1f844..e93bdf13f 100644
--- a/include/nlohmann/detail/view/node.hpp
+++ b/include/nlohmann/detail/view/node.hpp
@@ -45,7 +45,7 @@ struct node
 {
     std::uint8_t kind;   ///< value_t
     std::uint8_t flags;  ///< node_flags
-    std::uint16_t extra; ///< numbers: integer digits (low byte) and fraction digits (high byte), 255 = "many"; otherwise 0
+    std::uint16_t extra; ///< numbers: integer digits (low byte) and fraction digits (high byte), 255 = "many"; objects: number of the hash index (1-based, 0 = none); otherwise 0
     std::uint32_t off;   ///< source offset (string content, number token, literal, bracket); arena offset if node_flags::escaped
     std::uint32_t len;   ///< string: decoded bytes; float: token bytes; array/object: element count
     std::uint32_t next;  ///< array/object: number of nodes of the subtree (its extent in the enclosing sequence)