diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7c078761..977cad5a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,6 +42,7 @@ endif()
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 enable_testing()
+add_subdirectory(source/lib/json)
 add_subdirectory(source/Irrlicht)
 add_subdirectory(test)