diff --git a/runtime/runtime.cc b/runtime/runtime.cc
index fe877d5..e0c0d63 100644
--- a/runtime/runtime.cc
+++ b/runtime/runtime.cc
@@ -621,6 +621,7 @@
     case kThumb2:
     case kX86:
     case kArm64:
+    case kX86_64:
       implicit_null_checks_ = true;
       implicit_so_checks_ = true;
       break;