diff --git a/documentation/RELEASE_NOTES.html b/documentation/RELEASE_NOTES.html
index b99f5f620..76f7a824a 100644
--- a/documentation/RELEASE_NOTES.html
+++ b/documentation/RELEASE_NOTES.html
@@ -9,6 +9,8 @@
 <body lang="en">
 <h1 align="center">EPICS Base Release 3.15.2</h1>
 
+<p style="color:red">This version of EPICS Base has not been released yet.</p>
+
 <h2 align="center">Changes between 3.15.1 and 3.15.2</h2>
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