diff --git a/AssetRipper.TextureDecoder/Bc/BcDecoder.cs b/AssetRipper.TextureDecoder/Bc/BcDecoder.cs
index 95f995f..de2f4bf 100644
--- a/AssetRipper.TextureDecoder/Bc/BcDecoder.cs
+++ b/AssetRipper.TextureDecoder/Bc/BcDecoder.cs
@@ -162,18 +162,15 @@ namespace AssetRipper.TextureDecoder.Bc
 		public unsafe static int DecompressBC7(ReadOnlySpan<byte> input, int width, int height, Span<byte> output)
 		{
 			int bytesRead;
-			fixed (byte* inputPtr = input)
+			fixed (byte* outputPtr = output)
 			{
-				fixed (byte* outputPtr = output)
-				{
-					bytesRead = DecompressBC7(inputPtr, width, height, outputPtr);
-				}
+				bytesRead = DecompressBC7(input, width, height, outputPtr);
 			}
 			RgbConverter.Convert<ColorRGBA32, byte, ColorBGRA32, byte>(output, width, height, output);
 			return bytesRead;
 		}
 
-		private unsafe static int DecompressBC7(byte* input, int width, int height, byte* output)
+		private unsafe static int DecompressBC7(ReadOnlySpan<byte> input, int width, int height, byte* output)
 		{
 			int inputOffset = 0;
 			for (int i = 0; i < height; i += 4)
@@ -181,7 +178,7 @@ namespace AssetRipper.TextureDecoder.Bc
 				for (int j = 0; j < width; j += 4)
 				{
 					int outputOffset = ((i * width) + j) * Unsafe.SizeOf<ColorRGBA32>();
-					BcHelpers.DecompressBc7(input + inputOffset, output + outputOffset, width * 4);
+					BcHelpers.DecompressBc7(input.Slice(inputOffset, 16), output + outputOffset, width * 4);
 					inputOffset += DefineConstants.BCDEC_BC7_BLOCK_SIZE;
 				}
 			}
diff --git a/AssetRipper.TextureDecoder/Bc/BcHelpers.cs b/AssetRipper.TextureDecoder/Bc/BcHelpers.cs
index e13ab4a..a22dfe3 100644
--- a/AssetRipper.TextureDecoder/Bc/BcHelpers.cs
+++ b/AssetRipper.TextureDecoder/Bc/BcHelpers.cs
@@ -575,7 +575,7 @@ internal unsafe static class BcHelpers
 		}
 	}
 
-	public static void DecompressBc7(byte* compressedBlock, byte* decompressedBlock, int destinationPitch)
+	public static void DecompressBc7(ReadOnlySpan<byte> compressedBlock, byte* decompressedBlock, int destinationPitch)
 	{
 		BitStream bstream = new BitStream();
 		int mode;
@@ -604,8 +604,9 @@ internal unsafe static class BcHelpers
 		
 		byte* decompressed = decompressedBlock;
 
-		bstream.low = ((ulong*)compressedBlock)[0];
-		bstream.high = ((ulong*)compressedBlock)[1];
+		ReadOnlySpan<ulong> compressedBlockSpan = MemoryMarshal.Cast<byte, ulong>(compressedBlock);
+		bstream.low = compressedBlockSpan[0];
+		bstream.high = compressedBlockSpan[1];
 
 		for (mode = 0; mode < 8 && (0 == bstream.ReadBit()); ++mode)
 		{