diff --git a/NEWS.md b/NEWS.md
index c1caec6fad..1042b684f4 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -102,6 +102,10 @@ Note: We're only listing outstanding class updates.
 * Random::Formatter#alphanumeric is extended to accept optional `chars`
   keyword argument. [[Feature #18183]]
 
+The following default gem is added.
+
+* prism 0.15.1
+
 The following default gems are updated.
 
 * RubyGems 3.5.0.dev
@@ -115,7 +119,6 @@ The following default gems are updated.
 * nkf 0.1.3
 * openssl 3.2.0
 * optparse 0.4.0.pre.1
-* prism 0.15.1
 * psych 5.1.1.1
 * reline 0.3.9
 * stringio 3.0.9
diff --git a/tool/update-NEWS-gemlist.rb b/tool/update-NEWS-gemlist.rb
index 6804900df1..aea471aa4e 100755
--- a/tool/update-NEWS-gemlist.rb
+++ b/tool/update-NEWS-gemlist.rb
@@ -28,12 +28,14 @@ ARGV.each do |type|
     next unless v
     [g, v] unless last[g] == v
   end
-  if type == 'bundled'
-    changed, added = changed.partition {|g, _| last[g]}
-  end
+  changed, added = changed.partition {|g, _| last[g]}
   update[changed, type] or next
   if added and !added.empty?
-    update[added, 'default', 'now bundled'] or next
+    if type == 'bundled'
+      update[added, 'default', 'now bundled'] or next
+    else
+      update[added, 'default', 'added'] or next
+    end
   end
   File.write("NEWS.md", news)
 end