diff --git a/build/targets/x86_64.json b/build/targets/x86_64.json
index 0d5f2d49..31872419 100644
--- a/build/targets/x86_64.json
+++ b/build/targets/x86_64.json
@@ -1,6 +1,6 @@
 {
     "llvm-target": "x86_64-unknown-none",
-    "data-layout": "e-m:e-i64:64-f80:128-n8:16:32:64-S128",
+    "data-layout": "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128",
     "arch": "x86_64",
     "target-endian": "little",
     "target-pointer-width": "64",