diff --git a/software/ompi/v5.0/timeline-graph.php b/software/ompi/v5.0/timeline-graph.php
index 1c5af2c6b..5bca896e9 100644
--- a/software/ompi/v5.0/timeline-graph.php
+++ b/software/ompi/v5.0/timeline-graph.php
@@ -37,6 +37,7 @@
 milestone("v5.0.6", "2024-11-15", $data, $vpos);
 milestone("v5.0.7", "2025-02-14", $data, $vpos);
 milestone("v5.0.8", "2025-06-02", $data, $vpos);
+milestone("v5.0.9rc1", "2025-09-29", $data, $vpos);
 
 // Party on
 $graph->CreateSimple($data);
diff --git a/software/ompi/v5.0/version.inc b/software/ompi/v5.0/version.inc
index c5e415349..de0015d63 100644
--- a/software/ompi/v5.0/version.inc
+++ b/software/ompi/v5.0/version.inc
@@ -16,7 +16,7 @@ $releases = array("5.0.8", "5.0.7", "5.0.6", "5.0.5", "5.0.4", "5.0.3", "5.0.2",
 /* prereleases must be ordered newest to oldest.  All prereleases
    will be shown, so make an empty array when the official release
    is added to releases above */
-$prereleases = array();
+$prereleases = array("v5.0.9rc1");
 
 /* set to true if we should add a cygwin note */
 $cygwin_note = 0;