diff --git a/THIRD-PARTY-NOTICES b/THIRD-PARTY-NOTICES
index 962904c66..d6df8c431 100644
--- a/THIRD-PARTY-NOTICES
+++ b/THIRD-PARTY-NOTICES
@@ -11,6 +11,13 @@ bring it to our attention. Post an issue or email us:
 
 The attached notices are provided for information only.
 
+License notice for LZMA SDK
+---------------------------
+
+http://www.7-zip.org/sdk.html
+
+LZMA is placed in the public domain.
+
 License notice for RFC 3492
 ---------------------------
 
diff --git a/src/Microsoft.DotNet.Archive/LZMA/Common/CRC.cs b/src/Microsoft.DotNet.Archive/LZMA/Common/CRC.cs
index 82cc857ef..5d38bf911 100644
--- a/src/Microsoft.DotNet.Archive/LZMA/Common/CRC.cs
+++ b/src/Microsoft.DotNet.Archive/LZMA/Common/CRC.cs
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 // Common/CRC.cs
 
 namespace SevenZip
diff --git a/src/Microsoft.DotNet.Archive/LZMA/Common/InBuffer.cs b/src/Microsoft.DotNet.Archive/LZMA/Common/InBuffer.cs
index 7c51f0bc0..a26bf4a29 100644
--- a/src/Microsoft.DotNet.Archive/LZMA/Common/InBuffer.cs
+++ b/src/Microsoft.DotNet.Archive/LZMA/Common/InBuffer.cs
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 // InBuffer.cs
 
 namespace SevenZip.Buffer
diff --git a/src/Microsoft.DotNet.Archive/LZMA/Common/OutBuffer.cs b/src/Microsoft.DotNet.Archive/LZMA/Common/OutBuffer.cs
index 58c79544d..429bccfc9 100644
--- a/src/Microsoft.DotNet.Archive/LZMA/Common/OutBuffer.cs
+++ b/src/Microsoft.DotNet.Archive/LZMA/Common/OutBuffer.cs
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 // OutBuffer.cs
 
 namespace SevenZip.Buffer
diff --git a/src/Microsoft.DotNet.Archive/LZMA/Compress/LZ/IMatchFinder.cs b/src/Microsoft.DotNet.Archive/LZMA/Compress/LZ/IMatchFinder.cs
index 10ca2b37f..2916aedb0 100644
--- a/src/Microsoft.DotNet.Archive/LZMA/Compress/LZ/IMatchFinder.cs
+++ b/src/Microsoft.DotNet.Archive/LZMA/Compress/LZ/IMatchFinder.cs
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 // IMatchFinder.cs
 
 using System;
diff --git a/src/Microsoft.DotNet.Archive/LZMA/Compress/LZ/LzBinTree.cs b/src/Microsoft.DotNet.Archive/LZMA/Compress/LZ/LzBinTree.cs
index c1c006b63..017cf8ea2 100644
--- a/src/Microsoft.DotNet.Archive/LZMA/Compress/LZ/LzBinTree.cs
+++ b/src/Microsoft.DotNet.Archive/LZMA/Compress/LZ/LzBinTree.cs
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 // LzBinTree.cs
 
 using System;
diff --git a/src/Microsoft.DotNet.Archive/LZMA/Compress/LZ/LzInWindow.cs b/src/Microsoft.DotNet.Archive/LZMA/Compress/LZ/LzInWindow.cs
index 52d23ce39..1ee8282f1 100644
--- a/src/Microsoft.DotNet.Archive/LZMA/Compress/LZ/LzInWindow.cs
+++ b/src/Microsoft.DotNet.Archive/LZMA/Compress/LZ/LzInWindow.cs
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 // LzInWindow.cs
 
 using System;
diff --git a/src/Microsoft.DotNet.Archive/LZMA/Compress/LZ/LzOutWindow.cs b/src/Microsoft.DotNet.Archive/LZMA/Compress/LZ/LzOutWindow.cs
index c998584ac..479ae4f13 100644
--- a/src/Microsoft.DotNet.Archive/LZMA/Compress/LZ/LzOutWindow.cs
+++ b/src/Microsoft.DotNet.Archive/LZMA/Compress/LZ/LzOutWindow.cs
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 // LzOutWindow.cs
 
 namespace SevenZip.Compression.LZ
diff --git a/src/Microsoft.DotNet.Archive/LZMA/Compress/LZMA/LzmaBase.cs b/src/Microsoft.DotNet.Archive/LZMA/Compress/LZMA/LzmaBase.cs
index c7bca86f5..f4a8f823f 100644
--- a/src/Microsoft.DotNet.Archive/LZMA/Compress/LZMA/LzmaBase.cs
+++ b/src/Microsoft.DotNet.Archive/LZMA/Compress/LZMA/LzmaBase.cs
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 // LzmaBase.cs
 
 namespace SevenZip.Compression.LZMA
diff --git a/src/Microsoft.DotNet.Archive/LZMA/Compress/LZMA/LzmaDecoder.cs b/src/Microsoft.DotNet.Archive/LZMA/Compress/LZMA/LzmaDecoder.cs
index a94b7dd25..95d42eed0 100644
--- a/src/Microsoft.DotNet.Archive/LZMA/Compress/LZMA/LzmaDecoder.cs
+++ b/src/Microsoft.DotNet.Archive/LZMA/Compress/LZMA/LzmaDecoder.cs
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 // LzmaDecoder.cs
 
 using System;
diff --git a/src/Microsoft.DotNet.Archive/LZMA/Compress/LZMA/LzmaEncoder.cs b/src/Microsoft.DotNet.Archive/LZMA/Compress/LZMA/LzmaEncoder.cs
index 0237c51f1..527a67e0c 100644
--- a/src/Microsoft.DotNet.Archive/LZMA/Compress/LZMA/LzmaEncoder.cs
+++ b/src/Microsoft.DotNet.Archive/LZMA/Compress/LZMA/LzmaEncoder.cs
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 // LzmaEncoder.cs
 
 using System;
diff --git a/src/Microsoft.DotNet.Archive/LZMA/Compress/RangeCoder/RangeCoder.cs b/src/Microsoft.DotNet.Archive/LZMA/Compress/RangeCoder/RangeCoder.cs
index a4ef8ee32..d9c2e30ce 100644
--- a/src/Microsoft.DotNet.Archive/LZMA/Compress/RangeCoder/RangeCoder.cs
+++ b/src/Microsoft.DotNet.Archive/LZMA/Compress/RangeCoder/RangeCoder.cs
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 using System;
 
 namespace SevenZip.Compression.RangeCoder
diff --git a/src/Microsoft.DotNet.Archive/LZMA/Compress/RangeCoder/RangeCoderBit.cs b/src/Microsoft.DotNet.Archive/LZMA/Compress/RangeCoder/RangeCoderBit.cs
index 4f0346d17..46d27ed0f 100644
--- a/src/Microsoft.DotNet.Archive/LZMA/Compress/RangeCoder/RangeCoderBit.cs
+++ b/src/Microsoft.DotNet.Archive/LZMA/Compress/RangeCoder/RangeCoderBit.cs
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 using System;
 
 namespace SevenZip.Compression.RangeCoder
diff --git a/src/Microsoft.DotNet.Archive/LZMA/Compress/RangeCoder/RangeCoderBitTree.cs b/src/Microsoft.DotNet.Archive/LZMA/Compress/RangeCoder/RangeCoderBitTree.cs
index 4b4506f9d..f7985c47b 100644
--- a/src/Microsoft.DotNet.Archive/LZMA/Compress/RangeCoder/RangeCoderBitTree.cs
+++ b/src/Microsoft.DotNet.Archive/LZMA/Compress/RangeCoder/RangeCoderBitTree.cs
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 using System;
 
 namespace SevenZip.Compression.RangeCoder
diff --git a/src/Microsoft.DotNet.Archive/LZMA/ICoder.cs b/src/Microsoft.DotNet.Archive/LZMA/ICoder.cs
index 9ce106419..992f6823f 100644
--- a/src/Microsoft.DotNet.Archive/LZMA/ICoder.cs
+++ b/src/Microsoft.DotNet.Archive/LZMA/ICoder.cs
@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 // ICoder.h
 
 using System;