diff --git a/exercises/034_quiz4.zig b/exercises/034_quiz4.zig
index 8704397..28f2291 100644
--- a/exercises/034_quiz4.zig
+++ b/exercises/034_quiz4.zig
@@ -6,15 +6,17 @@
 //     my_num=42
 //
 const std = @import("std");
+const io = std.Options.debug_io;
 
 const NumError = error{IllegalNumber};
 
 pub fn main() void {
-    var stdout = std.fs.File.stdout().writer(&.{});
+    var stdout_writer = std.Io.File.stdout().writer(io, &.{});
+    const stdout = &stdout_writer.interface;
 
     const my_num: u32 = getNumber();
 
-    try stdout.interface.print("my_num={}\n", .{my_num});
+    try stdout.print("my_num={}\n", .{my_num});
 }
 
 // This function is obviously weird and non-functional. But you will not be changing it for this quiz.
diff --git a/patches/patches/034_quiz4.patch b/patches/patches/034_quiz4.patch
index 15c95fc..7cf102c 100644
--- a/patches/patches/034_quiz4.patch
+++ b/patches/patches/034_quiz4.patch
@@ -1,15 +1,16 @@
---- exercises/034_quiz4.zig	2025-07-22 09:55:51.337832401 +0200
-+++ answers/034_quiz4.zig	2025-07-22 10:05:08.320323184 +0200
-@@ -9,10 +9,10 @@
+--- exercises/034_quiz4.zig	2025-12-28 14:43:41.087943476 +0100
++++ answers/034_quiz4.zig	2025-12-28 14:42:23.878472164 +0100
+@@ -10,11 +10,11 @@
  
  const NumError = error{IllegalNumber};
  
 -pub fn main() void {
 +pub fn main() !void {
-     var stdout = std.fs.File.stdout().writer(&.{});
+     var stdout_writer = std.Io.File.stdout().writer(io, &.{});
+     const stdout = &stdout_writer.interface;
  
 -    const my_num: u32 = getNumber();
 +    const my_num: u32 = try getNumber();
  
-     try stdout.interface.print("my_num={}\n", .{my_num});
+     try stdout.print("my_num={}\n", .{my_num});
  }