diff --git a/lib/binding_rust/lib.rs b/lib/binding_rust/lib.rs
index 9245e417..870d177b 100644
--- a/lib/binding_rust/lib.rs
+++ b/lib/binding_rust/lib.rs
@@ -764,6 +764,7 @@ impl Tree {
         }
     }
 
+    /// Get the included ranges that were used to parse the syntax tree.
     pub fn included_ranges(&self) -> Vec<Range> {
         let mut count = 0u32;
         unsafe {
diff --git a/lib/include/tree_sitter/api.h b/lib/include/tree_sitter/api.h
index 5e9ce753..bc05bc3c 100644
--- a/lib/include/tree_sitter/api.h
+++ b/lib/include/tree_sitter/api.h
@@ -381,6 +381,11 @@ TSNode ts_tree_root_node_with_offset(
  */
 const TSLanguage *ts_tree_language(const TSTree *);
 
+/**
+ * Get the array of included ranges that was used to parse the syntax tree.
+ *
+ * The returned pointer must be freed by the caller.
+ */
 TSRange *ts_tree_included_ranges(const TSTree *, uint32_t *length);
 
 /**