diff --git a/src/ImageSharp/Formats/Tiff/TiffDecoderCore.cs b/src/ImageSharp/Formats/Tiff/TiffDecoderCore.cs
index 45bbed12d5..aed6d4ec66 100644
--- a/src/ImageSharp/Formats/Tiff/TiffDecoderCore.cs
+++ b/src/ImageSharp/Formats/Tiff/TiffDecoderCore.cs
@@ -344,7 +344,7 @@ internal class TiffDecoderCore : IImageDecoderInternals
             ArgumentNullException.ThrowIfNull(valueWidth);
         }
 
-        if (!tags.TryGetValue(ExifTag.TileWidth, out IExifValue<Number> valueLength))
+        if (!tags.TryGetValue(ExifTag.TileLength, out IExifValue<Number> valueLength))
         {
             ArgumentNullException.ThrowIfNull(valueLength);
         }