diff --git a/nixos/doc/manual/installation/upgrading.xml b/nixos/doc/manual/installation/upgrading.xml
index ef83d4595183..46d3af56b570 100644
--- a/nixos/doc/manual/installation/upgrading.xml
+++ b/nixos/doc/manual/installation/upgrading.xml
@@ -60,7 +60,7 @@ $ nix-channel --add https://nixos.org/channels/<replaceable>channel-name</replac
 end.)  For instance, to use the NixOS 14.04 stable channel:
 
 <screen>
-$ nix-channel --add http:s//nixos.org/channels/nixos-14.04 nixos
+$ nix-channel --add https://nixos.org/channels/nixos-14.04 nixos
 </screen>
 
 But if you want to live on the bleeding edge: