diff --git a/exercises/104_threading.zig b/exercises/104_threading.zig
index 8aeb683..7865839 100644
--- a/exercises/104_threading.zig
+++ b/exercises/104_threading.zig
@@ -118,7 +118,11 @@ pub fn main() !void {
 // In our example, we pass the number of the thread as a parameter.
 fn thread_function(num: usize) !void {
     std.debug.print("thread {d}: {s}\n", .{ num, "started." });
-    std.time.sleep((5 - num % 3) * std.time.ns_per_s);
+
+    // This timer simulates the work of the thread.
+    const work_time = 2 * ((5 - num % 3) - 2);
+    std.time.sleep(work_time * std.time.ns_per_s);
+
     std.debug.print("thread {d}: {s}\n", .{ num, "finished." });
 }
 // This is the easiest way to run threads in parallel.
diff --git a/patches/patches/104_threading.patch b/patches/patches/104_threading.patch
index 58410a8..304d39f 100644
--- a/patches/patches/104_threading.patch
+++ b/patches/patches/104_threading.patch
@@ -1,5 +1,5 @@
---- exercises/104_threading.zig	2024-03-05 09:09:04.013974229 +0100
-+++ answers/104_threading.zig	2024-03-05 09:12:03.987162883 +0100
+--- exercises/104_threading.zig	2024-04-10 16:02:33.680771772 +0200
++++ answers/104_threading.zig	2024-04-10 16:01:00.042331517 +0200
 @@ -97,12 +97,12 @@
          defer handle.join();