diff --git a/RELEASE-NOTES.txt b/RELEASE-NOTES.txt
index 0144800..c9072b8 100644
--- a/RELEASE-NOTES.txt
+++ b/RELEASE-NOTES.txt
@@ -12,6 +12,9 @@
 releases. This release is considered stable and targeted for
 production use.
 
+While Oak 1.38.0 compiles and tests successfully on Java 15, Javadocs
+generation fails on Java 15 (but works as expected on Java 8).
+
 The Oak effort is a part of the Apache Jackrabbit project.
 Apache Jackrabbit is a project of the Apache Software Foundation.