diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2494119..3ba1770 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.14.0)
 
-project(GlobalProtect-openconnect VERSION 1.3.3)
+project(GlobalProtect-openconnect VERSION 1.3.3 LANGUAGES CXX)
 
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)