diff --git a/src/LibHac/Common/U8Span.cs b/src/LibHac/Common/U8Span.cs
index 92cd9978..25daf063 100644
--- a/src/LibHac/Common/U8Span.cs
+++ b/src/LibHac/Common/U8Span.cs
@@ -90,7 +90,7 @@ namespace LibHac.Common
         /// </summary>
         /// <returns><see langword="true"/> if the span has no buffer.
         /// Otherwise, <see langword="false"/>.</returns>
-        public bool IsNull() => _buffer.IsEmpty;
+        public unsafe bool IsNull() => (IntPtr)Unsafe.AsPointer(ref MemoryMarshal.GetReference(_buffer)) == IntPtr.Zero;
 
         /// <summary>
         /// Checks if the <see cref="U8Span"/> has no buffer or begins with a null terminator.
diff --git a/src/LibHac/Common/U8SpanMutable.cs b/src/LibHac/Common/U8SpanMutable.cs
index 418fdccc..7d782ff2 100644
--- a/src/LibHac/Common/U8SpanMutable.cs
+++ b/src/LibHac/Common/U8SpanMutable.cs
@@ -86,7 +86,7 @@ namespace LibHac.Common
         /// </summary>
         /// <returns><see langword="true"/> if the span has no buffer.
         /// Otherwise, <see langword="false"/>.</returns>
-        public bool IsNull() => _buffer.IsEmpty;
+        public unsafe bool IsNull() => (IntPtr)Unsafe.AsPointer(ref MemoryMarshal.GetReference(_buffer)) == IntPtr.Zero;
 
         /// <summary>
         /// Checks if the <see cref="U8StringMutable"/> has no buffer or begins with a null terminator.
diff --git a/src/LibHac/FsSystem/NcaUtils/Nca.cs b/src/LibHac/FsSystem/NcaUtils/Nca.cs
index f9ee9676..7e55a6f4 100644
--- a/src/LibHac/FsSystem/NcaUtils/Nca.cs
+++ b/src/LibHac/FsSystem/NcaUtils/Nca.cs
@@ -557,7 +557,7 @@ namespace LibHac.FsSystem.NcaUtils
             return new HierarchicalIntegrityVerificationStorage(initInfo, integrityCheckLevel, leaveOpen);
         }
 
-        public IStorage OpenDecryptedHeaderStorage() => OpenHeaderStorage(true);
+        public IStorage OpenDecryptedHeaderStorage() => OpenHeaderStorage(false);
 
         public IStorage OpenHeaderStorage(bool openEncrypted)
         {