diff --git a/SWCompression.xcodeproj/project.pbxproj b/SWCompression.xcodeproj/project.pbxproj
index 02d51bc4..906a91a1 100644
--- a/SWCompression.xcodeproj/project.pbxproj
+++ b/SWCompression.xcodeproj/project.pbxproj
@@ -214,6 +214,7 @@
 		06F276DF1F2BAB4A00E67335 /* 7zEntry.swift in Sources */ = {isa = PBXBuildFile; fileRef = 06F276DE1F2BAB4900E67335 /* 7zEntry.swift */; };
 		06FEAD921F54B9CD00AD016E /* EncodingTree.swift in Sources */ = {isa = PBXBuildFile; fileRef = 06FEAD911F54B9CD00AD016E /* EncodingTree.swift */; };
 		E648151D26A889B8009261F0 /* TarHeader.swift in Sources */ = {isa = PBXBuildFile; fileRef = E648151C26A889B8009261F0 /* TarHeader.swift */; };
+		E64F71BC26AAFD6A008BB308 /* Data+Tar.swift in Sources */ = {isa = PBXBuildFile; fileRef = E64F71BB26AAFD6A008BB308 /* Data+Tar.swift */; };
 		E652D8F3263D670900FC229B /* test_nonstandard_runlength.bz2 in Resources */ = {isa = PBXBuildFile; fileRef = E652D8F2263D670900FC229B /* test_nonstandard_runlength.bz2 */; };
 		E652D8F5263D678000FC229B /* test_nonstandard_runlength.answer in Resources */ = {isa = PBXBuildFile; fileRef = E652D8F4263D678000FC229B /* test_nonstandard_runlength.answer */; };
 		E66F36242538726E00076A6E /* test_empty.lzma in Resources */ = {isa = PBXBuildFile; fileRef = E66F36232538726E00076A6E /* test_empty.lzma */; };
@@ -439,6 +440,7 @@
 		06FEAD911F54B9CD00AD016E /* EncodingTree.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = EncodingTree.swift; path = Sources/Common/CodingTree/EncodingTree.swift; sourceTree = SOURCE_ROOT; };
 		06FED40B1DD7717E0013DFB2 /* BZip2.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = BZip2.swift; sourceTree = "<group>"; };
 		E648151C26A889B8009261F0 /* TarHeader.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TarHeader.swift; sourceTree = "<group>"; };
+		E64F71BB26AAFD6A008BB308 /* Data+Tar.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Data+Tar.swift"; sourceTree = "<group>"; };
 		E652D8F2263D670900FC229B /* test_nonstandard_runlength.bz2 */ = {isa = PBXFileReference; lastKnownFileType = file; path = test_nonstandard_runlength.bz2; sourceTree = "<group>"; };
 		E652D8F4263D678000FC229B /* test_nonstandard_runlength.answer */ = {isa = PBXFileReference; lastKnownFileType = file; path = test_nonstandard_runlength.answer; sourceTree = "<group>"; };
 		E66F36232538726E00076A6E /* test_empty.lzma */ = {isa = PBXFileReference; lastKnownFileType = file; path = test_empty.lzma; sourceTree = "<group>"; };
@@ -641,6 +643,7 @@
 				0651FEC11F8E2E9100C49646 /* ContainerEntryType+Tar.swift */,
 				0656B82A1F8A979A00111605 /* ByteReader+Tar.swift */,
 				06CFF6B12078C5A5003B8375 /* TarEntryInfoProvider.swift */,
+				E64F71BB26AAFD6A008BB308 /* Data+Tar.swift */,
 			);
 			path = TAR;
 			sourceTree = "<group>";
@@ -1112,6 +1115,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				061C06521F0E904600832F0C /* ZipEndOfCentralDirectory.swift in Sources */,
+				E64F71BC26AAFD6A008BB308 /* Data+Tar.swift in Sources */,
 				06BB8F301E0C2C720079FB9E /* LZMA2.swift in Sources */,
 				0620F4C31F8E24B6001C9B7A /* CompressionAlgorithm.swift in Sources */,
 				06955E491F65C761004D5D79 /* BZip2+Lengths.swift in Sources */,
diff --git a/Sources/TAR/Data+Tar.swift b/Sources/TAR/Data+Tar.swift
new file mode 100644
index 00000000..c6b4f289
--- /dev/null
+++ b/Sources/TAR/Data+Tar.swift
@@ -0,0 +1,17 @@
+// Copyright (c) 2021 Timofey Solomko
+// Licensed under MIT License
+//
+// See LICENSE for license information
+
+import Foundation
+
+extension Data {
+
+    @inline(__always)
+    mutating func appendAsTarBlock(_ data: Data) {
+        self.append(data)
+        let paddingSize = data.count.roundTo512() - data.count
+        self.append(Data(count: paddingSize))
+    }
+
+}