diff --git a/framework/12th-gen-intel/default.nix b/framework/12th-gen-intel/default.nix
index e855a70..8d9bf67 100644
--- a/framework/12th-gen-intel/default.nix
+++ b/framework/12th-gen-intel/default.nix
@@ -34,10 +34,13 @@
   # For fingerprint support
   services.fprintd.enable = lib.mkDefault true;
 
-  # Fix headphone noise when on powersave
-  # https://community.frame.work/t/headphone-jack-intermittent-noise/5246/55
+  # Custom udev rules
   services.udev.extraRules = ''
+    # Fix headphone noise when on powersave
+    # https://community.frame.work/t/headphone-jack-intermittent-noise/5246/55
     SUBSYSTEM=="pci", ATTR{vendor}=="0x8086", ATTR{device}=="0xa0e0", ATTR{power/control}="on"
+    # Ethernet expansion card support
+    ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="0bda", ATTR{idProduct}=="8156", ATTR{power/autosuspend}="20"
   '';
 
   # Mis-detected by nixos-generate-config
diff --git a/framework/default.nix b/framework/default.nix
index 4ce0f58..2c07ff4 100644
--- a/framework/default.nix
+++ b/framework/default.nix
@@ -27,10 +27,13 @@
   # For fingerprint support
   services.fprintd.enable = lib.mkDefault true;
 
-  # Fix headphone noise when on powersave
-  # https://community.frame.work/t/headphone-jack-intermittent-noise/5246/55
+  # Custom udev rules
   services.udev.extraRules = ''
+    # Fix headphone noise when on powersave
+    # https://community.frame.work/t/headphone-jack-intermittent-noise/5246/55
     SUBSYSTEM=="pci", ATTR{vendor}=="0x8086", ATTR{device}=="0xa0e0", ATTR{power/control}="on"
+    # Ethernet expansion card support
+    ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="0bda", ATTR{idProduct}=="8156", ATTR{power/autosuspend}="20"
   '';
 
   # Mis-detected by nixos-generate-config