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-rw-r--r--doc/manual/release-notes.xml5
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/manual/release-notes.xml b/doc/manual/release-notes.xml
index 3db083870405..37bb730f4063 100644
--- a/doc/manual/release-notes.xml
+++ b/doc/manual/release-notes.xml
@@ -13,6 +13,11 @@
 
 <itemizedlist>
 
+  <listitem>
+    <para>New built-in function: <function>builtins.toJSON</function>,
+    which returns a JSON representation of a value.</para>
+  </listitem>
+
   <listitem><para><command>nix-setuid-helper</command> is
   gone.</para></listitem>