diff --git a/cellpose/gui/gui.py b/cellpose/gui/gui.py
index f753d893..8bb0cd26 100644
--- a/cellpose/gui/gui.py
+++ b/cellpose/gui/gui.py
@@ -274,7 +274,10 @@ def __init__(self, image=None, logger=None):
         self.reset()
 
         # This needs to go after .reset() is called to get state fully set up:
-        self.autobtn.checkStateChanged.connect(self.compute_saturation_if_checked)
+        try:
+            self.autobtn.checkStateChanged.connect(self.compute_saturation_if_checked)
+        except AttributeError:
+            self.autobtn.stateChanged.connect(self.compute_saturation_if_checked)
 
         self.load_3D = False