diff --git a/labelImg.py b/labelImg.py
index 0d2ea35d..c5d05c54 100755
--- a/labelImg.py
+++ b/labelImg.py
@@ -675,6 +675,8 @@ class MainWindow(QMainWindow, WindowMixin):
         if not self.canvas.editing():
             return
         item = self.currentItem()
+        if not item:
+            return
         text = self.labelDialog.popUp(item.text())
         if text is not None:
             item.setText(text)