diff --git a/nixos/modules/services/mail/postfix.nix b/nixos/modules/services/mail/postfix.nix
index 2c93754b781b..9715c8645dc3 100644
--- a/nixos/modules/services/mail/postfix.nix
+++ b/nixos/modules/services/mail/postfix.nix
@@ -1250,7 +1250,7 @@ in
       [ "services" "postfix" "settings" "main" "mynetworks" ]
     )
     (lib.mkRenamedOptionModule
-      [ "services" "postfix" "networkStyle" ]
+      [ "services" "postfix" "networksStyle" ]
       [ "services" "postfix" "settings" "main" "mynetworks_style" ]
     )
     (lib.mkRenamedOptionModule