diff --git a/linesegment.py b/linesegment.py
index 758c293..8968f52 100644
--- a/linesegment.py
+++ b/linesegment.py
@@ -58,7 +58,7 @@ class LineSegment:
         return max(self.__startpoint.get_y(), self.__endpoint.get_y())
     def __str__(self):
         """Return the line segment values as string."""
-        return self.__startpoint.str() + "-->" + self.__endpoint.str()
+        return str(self.__startpoint) + "-->" + str(self.__endpoint)
     def draw(self, canvas, width, height, max_x, max_y, color="#000000"):
         """Draw the line segment in a canvas."""
         from_x, from_y = self.__startpoint.draw(canvas, width, height, max_x, max_y, color)