diff --git a/doc/manual/installation/upgrading.xml b/doc/manual/installation/upgrading.xml
index 30670d7fe..592f63895 100644
--- a/doc/manual/installation/upgrading.xml
+++ b/doc/manual/installation/upgrading.xml
@@ -17,6 +17,11 @@
 
   <para>
     Single-user installations of Nix should run this:
-    <command>nix-channel --update; nix-env -iA nixpkgs.nix</command>
+    <command>nix-channel --update; nix-env -iA nixpkgs.nix nixpkgs.cacert</command>
+  </para>
+      
+  <para>
+    Multi-user Nix users on Linux should run this with sudo:
+    <command>nix-channel --update; nix-env -iA nixpkgs.nix nixpkgs.cacert; systemctl daemon-reload; systemctl restart nix-daemon</command>
   </para>
 </chapter>