diff --git a/src/com/jpexs/decompiler/flash/SWF.java b/src/com/jpexs/decompiler/flash/SWF.java
index 9682c1d2b..57ed6c952 100644
--- a/src/com/jpexs/decompiler/flash/SWF.java
+++ b/src/com/jpexs/decompiler/flash/SWF.java
@@ -531,6 +531,7 @@ public final class SWF implements TreeItem, Timelined {
         SWFHeader header = decompress(is, baos, true);
         gfx = header.gfx;
         compression = header.compression;
+        lzmaProperties = header.lzmaProperties;
         uncompressedData = baos.toByteArray();
 
         SWFInputStream sis = new SWFInputStream(this, uncompressedData);
@@ -778,6 +779,7 @@ public final class SWF implements TreeItem, Timelined {
                     }
 
                     header.compression = SWFCompression.LZMA;
+                    header.lzmaProperties = lzmaProperties;
                     break;
                 }
                 default: { // FWS, GFX
diff --git a/src/com/jpexs/decompiler/flash/SWFHeader.java b/src/com/jpexs/decompiler/flash/SWFHeader.java
index 8f5754154..4c7b12a69 100644
--- a/src/com/jpexs/decompiler/flash/SWFHeader.java
+++ b/src/com/jpexs/decompiler/flash/SWFHeader.java
@@ -37,6 +37,11 @@ public class SWFHeader {
      */
     public SWFCompression compression = SWFCompression.NONE;
 
+    /**
+     * LZMA properties
+     */
+    public byte[] lzmaProperties;
+
     /**
      * ScaleForm GFx
      */