diff --git a/README.md b/README.md
index 10c30ae033a..cb2fdebbbb6 100644
--- a/README.md
+++ b/README.md
@@ -693,6 +693,7 @@ additional ordered map implementations.
 - [mspm](https://github.com/BlackRabbitt/mspm) - Multi-String Pattern Matching Algorithm for information retrieval.
 - [parsefields](https://github.com/MonaxGT/parsefields) - Tools for parse JSON-like logs for collecting unique fields and events.
 - [ptrie](https://github.com/viant/ptrie) - An implementation of prefix tree.
+- [radixtree](https://github.com/gammazero/radixtree) - Adaptive radix tree (prefix-tree or compact-trie).
 - [trie](https://github.com/derekparker/trie) - Trie implementation in Go.
 
 ### Trees