diff --git a/quicktill/stocklines.py b/quicktill/stocklines.py
index da3c79b..5ef6596 100644
--- a/quicktill/stocklines.py
+++ b/quicktill/stocklines.py
@@ -115,7 +115,7 @@ def __init__(self, stocklines=None,
                     headerline])
 
     def keypress(self, k):
-        if k == keyboard.K_CANCEL and self.s:
+        if k == keyboard.K_CANCEL and self.s and self.s.cursor is not None:
             line = self.s.dl.pop(self.s.cursor)
             self.s.redraw()
             td.s.add(line.userdata)