diff --git a/src/ImageSharp/Formats/Jpeg/Common/Block8x8F.cs b/src/ImageSharp/Formats/Jpeg/Common/Block8x8F.cs
index 045a1f527a..191fa50ca5 100644
--- a/src/ImageSharp/Formats/Jpeg/Common/Block8x8F.cs
+++ b/src/ImageSharp/Formats/Jpeg/Common/Block8x8F.cs
@@ -612,7 +612,7 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Common
 
         public void RoundInplace()
         {
-            if (Vector<float>.Count == 8)
+            if (Vector<float>.Count == 8 && Vector<int>.Count == 8)
             {
                 ref Vector<float> row0 = ref Unsafe.As<Vector4, Vector<float>>(ref this.V0L);
                 row0 = row0.FastRound();
@@ -685,4 +685,4 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Common
         {
         }
     }
-}
\ No newline at end of file
+}