diff --git a/README.org b/README.org
index 4c02947..c141749 100644
--- a/README.org
+++ b/README.org
@@ -653,6 +653,8 @@ Deploy this configuration with ~sudo nixos-rebuild switch --flake /etc/dotfiles/
   networking.interfaces.eth0.useDHCP = true;
   networking.interfaces.wlan0.useDHCP = true;
 
+  <<host-config-wifi>>
+
   environment.systemPackages = [
     pkgs.libraspberrypi
     pkgs.raspberrypi-eeprom
diff --git a/hosts/raspberry/configuration.nix b/hosts/raspberry/configuration.nix
index 8b91c35..e3ba86c 100644
--- a/hosts/raspberry/configuration.nix
+++ b/hosts/raspberry/configuration.nix
@@ -8,6 +8,10 @@
   networking.interfaces.eth0.useDHCP = true;
   networking.interfaces.wlan0.useDHCP = true;
 
+  # Pre-configured wireless networks.
+  networking.wireless.networks.MyWiFi_5C1870.pskRaw =
+    "409b3c85fef1c5737f284d2f82f20dc6023e41804e862d4fa26265ef8193b326";
+
   environment.systemPackages = [
     pkgs.libraspberrypi
     pkgs.raspberrypi-eeprom