diff --git a/lib/std/Io/Threaded.zig b/lib/std/Io/Threaded.zig
index 4d5073f659..38f6199f46 100644
--- a/lib/std/Io/Threaded.zig
+++ b/lib/std/Io/Threaded.zig
@@ -11025,7 +11025,11 @@ fn openSocketWsa(
 ) !ws2_32.SOCKET {
     const mode = posixSocketMode(options.mode);
     const protocol = posixProtocol(options.protocol);
-    const flags: u32 = ws2_32.WSA_FLAG_NO_HANDLE_INHERIT;
+    // WSA_FLAG_OVERLAPPED is chosen here because without this different
+    // threads cannot use the same open socket handle.
+    // TODO: the below code needs to use the AlertableSyscall mechanism instead in
+    // order to make cancelation work.
+    const flags: u32 = ws2_32.WSA_FLAG_OVERLAPPED | ws2_32.WSA_FLAG_NO_HANDLE_INHERIT;
     var syscall: Syscall = try .start();
     while (true) {
         const rc = ws2_32.WSASocketW(family, @bitCast(mode), @bitCast(protocol), null, 0, flags);