diff --git a/pytec/tec_qt.py b/pytec/tec_qt.py
index 9ff0862..eec2ede 100644
--- a/pytec/tec_qt.py
+++ b/pytec/tec_qt.py
@@ -73,7 +73,7 @@ class MainWindow(QtWidgets.QMainWindow):
         def handle_connection_error():
             logging.error("Client connection error, disconnecting")
             self.info_box.display_info_box(
-                "Connection Error", "Thermostat disconnected. Is it unplugged?"
+                "Connection Error", "Thermostat connection lost. Is it unplugged?"
             )
 
             self.bail()