diff --git a/nixos/modules/virtualisation/waagent.nix b/nixos/modules/virtualisation/waagent.nix
index e3436a21d9c22..c90f7a999a42a 100644
--- a/nixos/modules/virtualisation/waagent.nix
+++ b/nixos/modules/virtualisation/waagent.nix
@@ -31,7 +31,7 @@ let
       attrsOf (
         either atom (attrsOf atom)
         // {
-          description = atom.description + "or an attribute set of them";
+          description = atom.description + " or an attribute set of them";
         }
       );
     generate =