diff --git a/third_party/CMakeLists.txt b/third_party/CMakeLists.txt
index 6882ceb93..2bd59862d 100644
--- a/third_party/CMakeLists.txt
+++ b/third_party/CMakeLists.txt
@@ -162,6 +162,7 @@ if(ENABLE_SCRIPTING)
     lua/lstrlib.c
     lua/ltablib.c
     lua/lutf8lib.c)
+  target_compile_definitions(lua PUBLIC LUA_FLOORN2I=1)
   target_include_directories(lua PUBLIC lua)
   target_include_directories(lauxlib PUBLIC lua)
   target_include_directories(lualib PUBLIC lua)