diff --git a/src/ImageSharp/Formats/Jpeg/Components/ColorConverters/JpegColorConverter.RgbArm.cs b/src/ImageSharp/Formats/Jpeg/Components/ColorConverters/JpegColorConverter.RgbArm.cs
index 73a81361f3..4a2112592f 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/ColorConverters/JpegColorConverter.RgbArm.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/ColorConverters/JpegColorConverter.RgbArm.cs
@@ -30,7 +30,7 @@ internal abstract partial class JpegColorConverterBase
 
             // Used for the color conversion
             var scale = Vector128.Create(1 / this.MaximumValue);
-            nint n = values.Component0.Length / Vector128<float>.Count;
+            nint n = (nint)(uint)values.Component0.Length / Vector128<float>.Count;
             for (nint i = 0; i < n; i++)
             {
                 ref Vector128<float> r = ref Unsafe.Add(ref rBase, i);