diff --git a/thirdparty/build/lua.lua b/thirdparty/build/lua.lua
index 76281076a..df66e0127 100644
--- a/thirdparty/build/lua.lua
+++ b/thirdparty/build/lua.lua
@@ -9,10 +9,6 @@ LIBRARY.Files = {
 	"../thirdparty/src/Lua/*.cpp"
 }
 
-LIBRARY.OsDefines.Windows = {
-	"LUA_USE_WINDOWS"
-}
-
 LIBRARY.OsDefines.Posix = {
 	"LUA_USE_LINUX"
 }