diff --git a/lib/std/child_process.zig b/lib/std/child_process.zig
index 978a45a2ccdc967cb5b86e908d04a2e0b90b37cc..adc7b9e7c0833577153616f07a331c3b4f2656a1 100644
--- a/lib/std/child_process.zig
+++ b/lib/std/child_process.zig
@@ -354,7 +354,7 @@ pub const ChildProcess = struct {
 
         // TODO collect output in a deadlock-avoiding way on Windows.
         // https://github.com/ziglang/zig/issues/6343
-        if (builtin.os.tag == .windows or builtin.os.tag == .haiku) {
+        if (builtin.os.tag == .haiku) {
             const stdout_in = child.stdout.?.reader();
             const stderr_in = child.stderr.?.reader();