diff --git a/SketchWidget.py b/SketchWidget.py
index 586ec89..e81995b 100644
--- a/SketchWidget.py
+++ b/SketchWidget.py
@@ -377,10 +377,15 @@ class SketchWidget:
 
     def do_line_left_click(self, x, y):
         start = self.screenPtToPt((x, self.size[1] - y))
+        previous_line = None
         if self.drawingShape is not None:
             start = self.drawingShape.getPt(1) # start at last snap point
+            previous_line = self.drawingShape
             self.merge_in_drawing_shape()
         self.drawingShape = Line(start[0], start[1], start[0], start[1])
+        if previous_line is not None:
+            connect = Connect(previous_line, 1, self.drawingShape, 0)
+            self.drawingConstraints['c'] = connect
         self.queue_redraw()
 
     def do_line_right_click(self, x, y):