diff --git a/nixos/modules/i18n/input-method/fcitx5.nix b/nixos/modules/i18n/input-method/fcitx5.nix
index 8156f424b2cb..06b1000c9959 100644
--- a/nixos/modules/i18n/input-method/fcitx5.nix
+++ b/nixos/modules/i18n/input-method/fcitx5.nix
@@ -117,7 +117,9 @@ in
     i18n.inputMethod.fcitx5.addons =
       lib.optionals (cfg.quickPhrase != { }) [
         (pkgs.writeTextDir "share/fcitx5/data/QuickPhrase.mb" (
-          lib.concatStringsSep "\n" (lib.mapAttrsToList (name: value: "${name} ${value}") cfg.quickPhrase)
+          lib.mapAttrsToList (
+            name: value: "${name} ${builtins.replaceStrings [ "\\" "\n" ] [ "\\\\" "\\n" ] value}"
+          ) cfg.quickPhrase
         ))
       ]
       ++ lib.optionals (cfg.quickPhraseFiles != { }) [