diff --git a/ArcFormats/ArcNexas.cs b/ArcFormats/ArcNexas.cs
index 977d6333..63b3e481 100644
--- a/ArcFormats/ArcNexas.cs
+++ b/ArcFormats/ArcNexas.cs
@@ -119,7 +119,12 @@ namespace GameRes.Formats.NeXAS
             switch (pac.PackType)
             {
             case Compression.Lzss:
-                return input;  // LZSS compression not implemented
+                using (input)
+                using (var reader = new LzssReader (input, (int)entry.Size, (int)entry.UnpackedSize))
+                {
+                    reader.Unpack();
+                    return new MemoryStream (reader.Data, false);
+                }
             case Compression.Huffman:
                 using (input)
                 {