diff --git a/piker/ui/_editors.py b/piker/ui/_editors.py
index c54a5ddf..7026282d 100644
--- a/piker/ui/_editors.py
+++ b/piker/ui/_editors.py
@@ -122,6 +122,8 @@ class LineEditor:
 
         """
         # chart.setCursor(QtCore.Qt.PointingHandCursor)
+        if not self.chart._cursor:
+            return None
 
         chart = self.chart._cursor.active_plot
         cursor = chart._cursor