diff --git a/doc/manual/command-ref/conf-file.xml b/doc/manual/command-ref/conf-file.xml
index 4bd73b2fc..1728abfd9 100644
--- a/doc/manual/command-ref/conf-file.xml
+++ b/doc/manual/command-ref/conf-file.xml
@@ -244,7 +244,7 @@ flag, e.g. <literal>--option gc-keep-outputs false</literal>.</para>
     users than root).  Currently, chroot builds only work on Linux
     because Nix uses “bind mounts” to make the Nix store and other
     directories available inside the chroot. Kernel version 3.13 or later
-    is needed due to a PID namespace fix nix depends on.</para>
+    is needed.</para>
 
     </listitem>