diff --git a/src/libs/languageserverprotocol/initializemessages.h b/src/libs/languageserverprotocol/initializemessages.h
index 9224cea7737..f0eb83beb31 100644
--- a/src/libs/languageserverprotocol/initializemessages.h
+++ b/src/libs/languageserverprotocol/initializemessages.h
@@ -124,7 +124,9 @@ public:
     bool isValid(QStringList *error) const override;
 };
 
-class LANGUAGESERVERPROTOCOL_EXPORT InitializeNotification : public Notification<std::nullptr_t>
+using InitializedParams = JsonObject;
+
+class LANGUAGESERVERPROTOCOL_EXPORT InitializeNotification : public Notification<InitializedParams>
 {
 public:
     InitializeNotification();