diff --git a/lib/std/builtin.zig b/lib/std/builtin.zig
index 114a4922a2b08006691f2f99602501102f74f31e..d14675b2fc5bd3b05a5eba7b2fb9e96121e0c760 100644
--- a/lib/std/builtin.zig
+++ b/lib/std/builtin.zig
@@ -470,7 +470,7 @@ pub const CallingConvention = union(enum(u8)) {
         /// `null` means the default for this calling convention.
         incoming_stack_alignment: ?u64 = null,
         /// The privilege mode.
-        mode: PrivilegeMode = .machine,
+        mode: PrivilegeMode,
 
         pub const PrivilegeMode = enum(u2) {
             supervisor,