diff --git a/Scripts/Canvas.gd b/Scripts/Canvas.gd
index 09287d29d..fec0a3518 100644
--- a/Scripts/Canvas.gd
+++ b/Scripts/Canvas.gd
@@ -257,8 +257,8 @@ func _process(delta : float) -> void:
 		is_making_line = true
 	elif Input.is_action_just_released("shift"):
 		is_making_line = false
-		line_2d.queue_free()
-
+		if is_instance_valid(line_2d):
+			line_2d.queue_free()
 	if is_making_line:
 		line_2d.set_point_position(1, mouse_pos)
 
diff --git a/Scripts/SelectionRectangle.gd b/Scripts/SelectionRectangle.gd
index ee8793ac9..3dcbad9eb 100644
--- a/Scripts/SelectionRectangle.gd
+++ b/Scripts/SelectionRectangle.gd
@@ -63,7 +63,7 @@ func _process(delta : float) -> void:
 			update()
 
 			# Makes line2d invisible
-			if weakref(Global.canvas.line_2d).get_ref():	# Checks to see if line_2d object still exists
+			if is_instance_valid(Global.canvas.line_2d):	# Checks to see if line_2d object still exists
 				Global.canvas.line_2d.default_color = Color(0, 0, 0, 0)
 	else:
 		get_parent().get_parent().mouse_default_cursor_shape = Input.CURSOR_ARROW
@@ -104,7 +104,7 @@ func _process(delta : float) -> void:
 			Global.canvas.handle_redo("Rectangle Select") #Redo
 
 			# Makes line2d visible
-			if weakref(Global.canvas.line_2d).get_ref():	# Checks to see if line_2d object still exists
+			if is_instance_valid(Global.canvas.line_2d):	# Checks to see if line_2d object still exists
 				Global.canvas.line_2d.default_color = Color.darkgray
 
 	#Handle copy