diff --git a/hosts/abacus/filebrowser.nix b/hosts/abacus/filebrowser.nix
index 604344c..bb8eba6 100644
--- a/hosts/abacus/filebrowser.nix
+++ b/hosts/abacus/filebrowser.nix
@@ -4,6 +4,7 @@
 in{
   services.filebrowser = {
     enable = true;
+    cacheDir = null;
     settings = {
       address = "localhost";
       port = 8090;
diff --git a/modules/filebrowser.nix b/modules/filebrowser.nix
index b8960ed..31bdd2b 100644
--- a/modules/filebrowser.nix
+++ b/modules/filebrowser.nix
@@ -90,9 +90,9 @@ in
             };
 
             cache-dir = lib.mkOption {
-              default = "/var/cache/${cfg.cacheDir}";
+              default = if cfg.cacheDir != null then "/var/cache/${cfg.cacheDir}" else null;
               defaultText = lib.literalExpression ''
-                "/var/cache/''${config.services.filebrowser.cacheDir}"
+                if config.services.filebrowser.cacheDir != null then "/var/cache/''${config.services.filebrowser.cacheDir}" else null
               '';
               description = ''
                 The directory where FileBrowser stores its cache.