diff --git a/CMakeLists.txt b/CMakeLists.txt
index 403f4c775..77f31a5cf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 2.4)
-project (eressea)
+project (eressea C)
 
 if (WIN32)
   add_definitions(-D_CRT_SECURE_NO_WARNINGS -D_CRT_SECURE_NO_DEPRECATE)