diff --git a/lib/std/Io/Dir.zig b/lib/std/Io/Dir.zig
index 330ac5bf62..238f25eb6b 100644
--- a/lib/std/Io/Dir.zig
+++ b/lib/std/Io/Dir.zig
@@ -103,8 +103,8 @@ pub const Reader = struct {
 
     /// A length for `buffer` that allows all implementations to function.
     pub const min_buffer_len = switch (native_os) {
-        .linux => @sizeOf(std.os.linux.dirent64) +
-            std.mem.alignForward(usize, max_name_bytes, @alignOf(std.os.linux.dirent64)),
+        .linux => std.mem.alignForward(usize, @sizeOf(std.os.linux.dirent64), 8) +
+            std.mem.alignForward(usize, max_name_bytes, 8),
         .windows => std.mem.alignForward(usize, max_name_bytes, @alignOf(usize)),
         else => if (builtin.link_libc) @sizeOf(std.c.dirent) else std.mem.alignForward(usize, max_name_bytes, @alignOf(usize)),
     };