diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6b77c27..b2fd740 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,7 +25,7 @@ else()
     option(LUA_BUILD_COMPILER "Build luac compiler" ON)
 endif()
 
-add_subdirectory(lua-${CMAKE_PROJECT_VERSION})
+add_subdirectory(lua-${PROJECT_VERSION})
 
 if(LUA_ENABLE_TESTING)
     add_test(NAME lua-testsuite COMMAND lua -e "_U=true" all.lua WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/lua-${CMAKE_PROJECT_VERSION}-tests)