diff --git a/CMakeLists.txt b/CMakeLists.txt
index b073b30..c7fd7cb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -29,7 +29,7 @@ endif()
 
 # ############
 # Define Project
-project(triqs_hubbardI VERSION 3.3.0 LANGUAGES C CXX)
+project(triqs_hubbardI VERSION 3.3.0 LANGUAGES CXX)
 get_directory_property(IS_SUBPROJECT PARENT_DIRECTORY)
 
 # ############