diff --git a/devices/gl-mt300a/default.nix b/devices/gl-mt300a/default.nix
index d5bd1056..02f02f9b 100644
--- a/devices/gl-mt300a/default.nix
+++ b/devices/gl-mt300a/default.nix
@@ -18,7 +18,7 @@
     support into the kernel even if we're using TFTP root
   '';
 
-  module = { pkgs, config, ...}:
+  module = { pkgs, config, lib, ...}:
     let
       inherit (pkgs.liminix.networking) interface;
       inherit (pkgs) openwrt;
@@ -151,6 +151,8 @@
 
           PARTITION_ADVANCED = "y";
           PRINTK_TIME = "y";
+        } // lib.optionalAttrs (config.system.service ? vlan) {
+          SWCONFIG = "y";
         };
       };
     };
diff --git a/devices/gl-mt300n-v2/default.nix b/devices/gl-mt300n-v2/default.nix
index dca648ad..0b62e9c2 100644
--- a/devices/gl-mt300n-v2/default.nix
+++ b/devices/gl-mt300n-v2/default.nix
@@ -11,7 +11,7 @@
     };
   };
 
-  module = { pkgs, config, ...}:
+  module = { pkgs, config, lib, ...}:
     let
       inherit (pkgs.liminix.networking) interface;
       inherit (pkgs.liminix.services) oneshot;
@@ -160,6 +160,8 @@
 
           PARTITION_ADVANCED = "y";
           PRINTK_TIME = "y";
+        } // lib.optionalAttrs (config.system.service ? vlan) {
+          SWCONFIG = "y";
         };
       };
     };
diff --git a/modules/vlan/default.nix b/modules/vlan/default.nix
index 2d747ecf..6698630e 100644
--- a/modules/vlan/default.nix
+++ b/modules/vlan/default.nix
@@ -36,6 +36,5 @@ in
   };
   config.kernel.config = {
     VLAN_8021Q = "y";
-    SWCONFIG = "y"; # not always appropriate, some devices will use DSA
   };
 }