diff --git a/lib/std/posix.zig b/lib/std/posix.zig
index 9fb55db0c8052fa2b863cb3b8315da746bf11e43..ae638226a18d1cc4c276ddfd15eb46ffb4e4d2e2 100644
--- a/lib/std/posix.zig
+++ b/lib/std/posix.zig
@@ -3936,6 +3936,7 @@ pub fn accept(
                     .WSANOTINITIALISED => unreachable, // not initialized WSA
                     .WSAECONNRESET => return error.ConnectionResetByPeer,
                     .WSAEFAULT => unreachable,
+                    .WSAENOTSOCK => return error.FileDescriptorNotASocket,
                     .WSAEINVAL => return error.SocketNotListening,
                     .WSAEMFILE => return error.ProcessFdQuotaExceeded,
                     .WSAENETDOWN => return error.NetworkSubsystemFailed,