diff --git a/thirdparty/build/newton.lua b/thirdparty/build/newton.lua
index 3faecd6e0..1c5bb8995 100644
--- a/thirdparty/build/newton.lua
+++ b/thirdparty/build/newton.lua
@@ -38,8 +38,5 @@ LIBRARY.Custom = function()
 		defines("_POSIX_VER")
 		
 	filter({"architecture:x86_64", "system:macosx"})
-		defines("_POSIX_VER_64")
-
-	filter({"architecture:x86", "system:macosx"})
-		defines("_POSIX_VER")
-end
\ No newline at end of file
+		defines("_MACOSX_VER")
+end