diff --git a/Library/DiscUtils.Ntfs/SecurityDescriptor.cs b/Library/DiscUtils.Ntfs/SecurityDescriptor.cs
index 963fe5ef7..8d4175d46 100644
--- a/Library/DiscUtils.Ntfs/SecurityDescriptor.cs
+++ b/Library/DiscUtils.Ntfs/SecurityDescriptor.cs
@@ -76,7 +76,7 @@ public void WriteTo(Span<byte> buffer)
         }
         else
         {
-            EndianUtilities.WriteBytesLittleEndian(0, buffer.Slice(0x10));
+            buffer.Slice(0x10).Clear();
         }
 
         var sysAcl = Descriptor.SystemAcl;
@@ -88,7 +88,7 @@ public void WriteTo(Span<byte> buffer)
         }
         else
         {
-            EndianUtilities.WriteBytesLittleEndian(0, buffer.Slice(0x0C));
+            buffer.Slice(0x0C).Clear();
         }
 
         EndianUtilities.WriteBytesLittleEndian(pos, buffer.Slice(0x04));
diff --git a/Library/DiscUtils.SquashFs/FragmentRecord.cs b/Library/DiscUtils.SquashFs/FragmentRecord.cs
index b8f386e8a..31a67a047 100644
--- a/Library/DiscUtils.SquashFs/FragmentRecord.cs
+++ b/Library/DiscUtils.SquashFs/FragmentRecord.cs
@@ -48,6 +48,6 @@ public void WriteTo(Span<byte> buffer)
     {
         EndianUtilities.WriteBytesLittleEndian(StartBlock, buffer);
         EndianUtilities.WriteBytesLittleEndian(CompressedSize, buffer.Slice(8));
-        EndianUtilities.WriteBytesLittleEndian(0, buffer.Slice(12));
+        buffer.Slice(12).Clear();
     }
 }
\ No newline at end of file