diff --git a/src/SharpCompress/Common/SevenZip/SevenZipFilePart.cs b/src/SharpCompress/Common/SevenZip/SevenZipFilePart.cs
index ac1ad24d..561a215a 100644
--- a/src/SharpCompress/Common/SevenZip/SevenZipFilePart.cs
+++ b/src/SharpCompress/Common/SevenZip/SevenZipFilePart.cs
@@ -75,6 +75,8 @@ internal class SevenZipFilePart : FilePart
 
     internal CompressionType GetCompression()
     {
+        if( Header.IsDir ) return CompressionType.None;
+
         var coder = Folder!._coders.First();
         switch (coder._methodId._id)
         {
@@ -97,5 +99,5 @@ internal class SevenZipFilePart : FilePart
     }
 
     internal bool IsEncrypted =>
-        Folder!._coders.FindIndex(c => c._methodId._id == CMethodId.K_AES_ID) != -1;
+        Header.IsDir ? false : Folder!._coders.FindIndex(c => c._methodId._id == CMethodId.K_AES_ID) != -1;
 }