diff --git a/nixos/modules/services/networking/wpa_supplicant.nix b/nixos/modules/services/networking/wpa_supplicant.nix
index 69c3f25d1870..f4caf21dc3b2 100644
--- a/nixos/modules/services/networking/wpa_supplicant.nix
+++ b/nixos/modules/services/networking/wpa_supplicant.nix
@@ -94,7 +94,7 @@ let
         ++ optional (pskString != null) "psk=${pskString}"
         ++ optionals (opts.auth != null) (filter (x: x != "") (splitString "\n" opts.auth))
         ++ optional (opts.priority != null) "priority=${toString opts.priority}"
-        ++ optional (opts.extraConfig != "") opts.extraConfig;
+        ++ filter (x: x != "") (splitString "\n" opts.extraConfig);
     in
     ''
       network={