diff --git a/docs/ReleaseNotes.txt b/docs/ReleaseNotes.txt
index e7f36c62a2c..d39e5ab9a5f 100644
--- a/docs/ReleaseNotes.txt
+++ b/docs/ReleaseNotes.txt
@@ -45,6 +45,7 @@ Version 5.1.0
                  and EOCD records.
   * **[CMake]** Add suitable RUNPATH to build-tree library.
   * **[CMake]** Add 'plugins' phony target.
+  * **[XrdSciTokens]** Add scitokens plugin.
 
 + **Major bug fixes**
   * **[Server]** Make sure that alignment is a power of two for posix_memalign.