diff --git a/NoiseEngine/Interop/InteropArray.cs b/NoiseEngine/Interop/InteropArray.cs
index 0ff13aca..67bf5f3d 100644
--- a/NoiseEngine/Interop/InteropArray.cs
+++ b/NoiseEngine/Interop/InteropArray.cs
@@ -61,7 +61,7 @@ public InteropArray() {
     /// </summary>
     /// <param name="length">Length of the array.</param>
     public unsafe InteropArray(int length) {
-        nuint size = (nuint)Marshal.SizeOf<T>();
+        nuint size = MemoryHelper.AlignmentOf<T>();
         pointer = (T*)NativeMemory.AlignedAlloc(size * (nuint)length, size);
         Length = length;
     }