1 files changed, 7 insertions, 3 deletions
diff --git a/java/awt/BasicStroke.java b/java/awt/BasicStroke.java
index e6cb87e34..ef6a7f0b7 100644
--- a/java/awt/BasicStroke.java
+++ b/java/awt/BasicStroke.java
@@ -761,9 +761,13 @@ public class BasicStroke implements Stroke
         p1 = new double[]{a.last.P2.getX(), a.last.P2.getY()};
         dx = p1[0] - p0[0];
         dy = p1[1] - p0[1];
-        l = Math.sqrt(dx * dx + dy * dy);
-        dx = (2.0/3.0)*width*dx/l;
-        dy = (2.0/3.0)*width*dy/l;
+        if (dx != 0 && dy != 0)
+          {
+            l = Math.sqrt(dx * dx + dy * dy);
+            dx = (2.0/3.0)*width*dx/l;
+            dy = (2.0/3.0)*width*dy/l;
+          }
+        
         c1 = new Point2D.Double(p1[0] + dx, p1[1] + dy);
         c2 = new Point2D.Double(b.P1.getX() + dx, b.P1.getY() + dy);
         a.add(new CubicSegment(a.last.P2, c1, c2, b.P1));