diff --git a/nixos/modules/tasks/network-interfaces.nix b/nixos/modules/tasks/network-interfaces.nix
index dc62cae24c7..9042418b723 100644
--- a/nixos/modules/tasks/network-interfaces.nix
+++ b/nixos/modules/tasks/network-interfaces.nix
@@ -391,7 +391,7 @@ in
     };
 
     networking.localCommands = mkOption {
-      type = types.str;
+      type = types.lines;
       default = "";
       example = "text=anything; echo You can put $text here.";
       description = ''