diff --git a/lib/std/elf.zig b/lib/std/elf.zig
index 966dbb6e49eae3c04ec6a4a9eb0213fb6e462098..28dc645307c31a5dacaaa0fca5664d0551659aa8 100644
--- a/lib/std/elf.zig
+++ b/lib/std/elf.zig
@@ -1602,7 +1602,7 @@ pub const Elf32_auxv_t = extern struct {
     },
 };
 pub const Elf64_auxv_t = extern struct {
-    a_type: u64,
+    a_type: if (native_os == .netbsd or native_os == .openbsd) u32 else u64,
     a_un: extern union {
         a_val: u64,
     },