diff --git a/lib/std/os.zig b/lib/std/os.zig
index 3bb54e96a84910de9a057922b8ef63880919e2c0..c99e900b11fd74686a40d056176f60af6c7f5be6 100644
--- a/lib/std/os.zig
+++ b/lib/std/os.zig
@@ -5920,6 +5920,7 @@ pub fn send(
         error.NetworkUnreachable => unreachable,
         error.AddressNotAvailable => unreachable,
         error.SocketNotConnected => unreachable,
+        error.UnreachableAddress => unreachable,
         else => |e| return e,
     };
 }