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-rw-r--r--doc/manual/writing-nix-expressions.xml3
1 files changed, 3 insertions, 0 deletions
diff --git a/doc/manual/writing-nix-expressions.xml b/doc/manual/writing-nix-expressions.xml
index 4b6574288eb2..3e6cd7379015 100644
--- a/doc/manual/writing-nix-expressions.xml
+++ b/doc/manual/writing-nix-expressions.xml
@@ -782,6 +782,9 @@ stdenv.mkDerivation {
   <literal>true</literal> and
   <literal>false</literal>.</para></listitem>
 
+  <listitem><para>The null value, denoted as
+  <literal>null</literal>.</para></listitem>
+
 </itemizedlist>
 
 </para>