diff --git a/src/python/adgui.py b/src/python/adgui.py
index 48f4b693..35b4bd65 100755
--- a/src/python/adgui.py
+++ b/src/python/adgui.py
@@ -472,6 +472,8 @@ class adgui(QObject):
         self.app = QApplication(sys.argv)
 
         self.port = None
+        self.pgm = None
+        self.dev = None
         self.dev_selected = None
         self.prog_selected = None
         self.connected = False