diff --git a/csharp/qrcode/detector/FinderPatternFinder.cs b/csharp/qrcode/detector/FinderPatternFinder.cs
index f9e3834bd..6023ef0f5 100755
--- a/csharp/qrcode/detector/FinderPatternFinder.cs
+++ b/csharp/qrcode/detector/FinderPatternFinder.cs
@@ -408,10 +408,10 @@ namespace com.google.zxing.qrcode.detector
                   // How far down can we skip before resuming looking for the next
                   // pattern? In the worst case, only the difference between the
                   // difference in the x / y coordinates of the two centers.
-                  // This is the case where you find top left first. Draw it out.
+                    // This is the case where you find top left last.
                   hasSkipped = true;
                   return (int) (Math.Abs(firstConfirmedCenter.getX() - center.getX()) -
-                      Math.Abs(firstConfirmedCenter.getY() - center.getY()));
+                      Math.Abs(firstConfirmedCenter.getY() - center.getY())) / 2;
                 }
               }
             }