diff --git a/modules/plugins/languages/markdown.nix b/modules/plugins/languages/markdown.nix
index 4563bc44..008192e3 100644
--- a/modules/plugins/languages/markdown.nix
+++ b/modules/plugins/languages/markdown.nix
@@ -119,14 +119,9 @@ in {
 
         setupOpts = mkPluginSetupOption "render-markdown" {
           file_types = lib.mkOption {
-            type = nullOr (listOf str);
-            default = null;
-            description = ''
-              List of buffer filetypes to enable this plugin in.
-
-              This will cause the plugin to attach to new buffers who
-              have any of these filetypes.
-            '';
+            type = listOf (nullOr str);
+            default = [];
+            description = "List of buffer filetypes to enable this plugin in. This will cause the plugin to attach to new buffers who have any of these filetypes.";
           };
         };
       };