diff --git a/options.nix b/options.nix
index c300d1c..d6458e4 100644
--- a/options.nix
+++ b/options.nix
@@ -105,11 +105,26 @@ let
               Mode = router
               ConnecTo = bar
           '';
-          description = "Configuration supplémentaire pour tinc";
+          description = "Configuration supplémentaire pour tinc.";
           type = lib.types.string;
         };
       };
 
+      quagga = {
+        enable = mkEnableOption "Enable Quagga + BGP service";
+        bgpConfig = mkOption {
+          type = types.lines;
+          default = "";
+          example =''
+              router bgp 65001
+                neighbor 10.0.0.1 remote-as 65001
+            '';
+          description = ''
+            BGP configuration statements.
+          '';
+        };
+      };
+
       windowsBoot = {
         enable = mkEnableOption "Activation du démarrage de Windows par Grub";
         drive = mkOption {