diff --git a/lib/std/child_process.zig b/lib/std/child_process.zig
index 444adebbdc..4be8b1cd83 100644
--- a/lib/std/child_process.zig
+++ b/lib/std/child_process.zig
@@ -661,8 +661,8 @@ pub const ChildProcess = struct {
         const nul_handle = if (any_ignore)
             // "\Device\Null" or "\??\NUL"
             windows.OpenFile(&[_]u16{ '\\', 'D', 'e', 'v', 'i', 'c', 'e', '\\', 'N', 'u', 'l', 'l' }, .{
-                .access_mask = windows.GENERIC_READ | windows.SYNCHRONIZE,
-                .share_access = windows.FILE_SHARE_READ,
+                .access_mask = windows.GENERIC_READ | windows.GENERIC_WRITE | windows.SYNCHRONIZE,
+                .share_access = windows.FILE_SHARE_READ | windows.FILE_SHARE_WRITE,
                 .creation = windows.OPEN_EXISTING,
                 .io_mode = .blocking,
             }) catch |err| switch (err) {
@@ -681,7 +681,7 @@ pub const ChildProcess = struct {
             if (any_ignore) os.close(nul_handle);
         }
         if (any_ignore) {
-            try windows.SetHandleInformation(nul_handle, windows.HANDLE_FLAG_INHERIT, 0);
+            try windows.SetHandleInformation(nul_handle, windows.HANDLE_FLAG_INHERIT, windows.HANDLE_FLAG_INHERIT);
         }
 
         var g_hChildStd_IN_Rd: ?windows.HANDLE = null;