diff --git a/lib/std/builtin.zig b/lib/std/builtin.zig
index 00326e3001b2..5dea4e8ffa0f 100644
--- a/lib/std/builtin.zig
+++ b/lib/std/builtin.zig
@@ -635,7 +635,7 @@ pub const CallOptions = struct {
 pub const VaList = switch (builtin.cpu.arch) {
     .aarch64 => switch (builtin.os.tag) {
         .windows => *u8,
-        .ios, .macosx, .tvos, .watchos => *u8,
+        .ios, .macos, .tvos, .watchos => *u8,
         else => [1]extern struct {
             __stack: *anyopaque,
             __gr_top: *anyopaque,
@@ -646,7 +646,7 @@ pub const VaList = switch (builtin.cpu.arch) {
     },
     .sparc, .wasm32, .wasm64, .bpfel, .bpfeb, .riscv32, .riscv64, .avr, .spirv32, .spirv64 => *anyopaque,
     .powerpc => switch (builtin.os.tag) {
-        .ios, .macosx, .tvos, .watchos, .aix => *u8,
+        .ios, .macos, .tvos, .watchos, .aix => *u8,
         else => [1]extern struct {
             gpr: u8,
             fpr: u8,