diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8d27a82..6840295 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -34,9 +34,9 @@
 cmake_policy(SET CMP0012 NEW)
 
 if(TEST_CPP)
-    project("mbed TLS" C CXX)
+    project("mbed TLS" LANGUAGES C CXX)
 else()
-    project("mbed TLS" C)
+    project("mbed TLS" LANGUAGES C)
 endif()
 
 include(GNUInstallDirs)