diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5600b0156..d86b0d252 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.16)
-project(deltachat)
+project(deltachat LANGUAGES C)
 
 find_program(CARGO cargo)