diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1627a69..3c97840 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,7 +6,7 @@ endif()
 
 # ############
 # Define Project
-project(clair VERSION 0.1.0 LANGUAGES CXX)
+project(clair VERSION 0.1.0 LANGUAGES C CXX)
 get_directory_property(IS_SUBPROJECT PARENT_DIRECTORY)
 
 if(NOT CMAKE_CXX_COMPILER_ID MATCHES "Clang")