diff --git a/docs/src/introduction/available-data-structures.md b/docs/src/introduction/available-data-structures.md
index 64d95b58..1cf8fa31 100644
--- a/docs/src/introduction/available-data-structures.md
+++ b/docs/src/introduction/available-data-structures.md
@@ -3,6 +3,7 @@
 The library provides several stable data structures:
 
 * **BTreeMap**: A key-value store that maintains keys in sorted order
+* **BTreeSet**: A B-Tree set implementation that stores its data into a designated memory.
 * **Vec**: A growable array
 * **Log**: An append-only list of variable-size entries
 * **Cell**: A serializable value