diff --git a/src/SharpCompress/Common/Tar/Headers/TarHeader.Async.cs b/src/SharpCompress/Common/Tar/Headers/TarHeader.Async.cs
index 084cd83d..870c472c 100644
--- a/src/SharpCompress/Common/Tar/Headers/TarHeader.Async.cs
+++ b/src/SharpCompress/Common/Tar/Headers/TarHeader.Async.cs
@@ -59,7 +59,7 @@ internal sealed partial class TarHeader
             int splitIndex = -1;
             for (int i = 0; i < dirSeps.Count; i++)
             {
-#if NET6_0_OR_GREATER
+#if NET5_0_OR_GREATER
                 int count = ArchiveEncoding
                     .GetEncoding()
                     .GetByteCount(fullName.AsSpan(0, dirSeps[i]));
diff --git a/src/SharpCompress/Common/Tar/Headers/TarHeader.cs b/src/SharpCompress/Common/Tar/Headers/TarHeader.cs
index 233970b2..2c538067 100644
--- a/src/SharpCompress/Common/Tar/Headers/TarHeader.cs
+++ b/src/SharpCompress/Common/Tar/Headers/TarHeader.cs
@@ -89,7 +89,7 @@ internal sealed partial class TarHeader
             int splitIndex = -1;
             for (int i = 0; i < dirSeps.Count; i++)
             {
-#if NET6_0_OR_GREATER
+#if NET5_0_OR_GREATER
                 int count = ArchiveEncoding
                     .GetEncoding()
                     .GetByteCount(fullName.AsSpan(0, dirSeps[i]));
diff --git a/src/SharpCompress/Polyfills/StreamExtensions.cs b/src/SharpCompress/Polyfills/StreamExtensions.cs
index e3caa24f..18c5b593 100644
--- a/src/SharpCompress/Polyfills/StreamExtensions.cs
+++ b/src/SharpCompress/Polyfills/StreamExtensions.cs
@@ -28,7 +28,7 @@ public static class StreamExtensions
         public Task SkipAsync(CancellationToken cancellationToken = default)
         {
             cancellationToken.ThrowIfCancellationRequested();
-#if NET6_0_OR_GREATER
+#if NET5_0_OR_GREATER
             return stream.CopyToAsync(Stream.Null, cancellationToken);
 #else
             return stream.CopyToAsync(Stream.Null);