diff --git a/packages/tailwindcss-language-server/src/server.ts b/packages/tailwindcss-language-server/src/server.ts
index 2f84eb7..94996ca 100644
--- a/packages/tailwindcss-language-server/src/server.ts
+++ b/packages/tailwindcss-language-server/src/server.ts
@@ -156,7 +156,9 @@ async function createProjectService(
     editor: {
       connection,
       globalSettings: params.initializationOptions.configuration as Settings,
-      userLanguages: params.initializationOptions.userLanguages,
+      userLanguages: params.initializationOptions.userLanguages
+        ? params.initializationOptions.userLanguages
+        : {},
       // TODO
       capabilities: {
         configuration: true,