diff --git a/Lib/idlelib/IOBinding.py b/Lib/idlelib/IOBinding.py
index deeb5c5..37aa08e 100644
--- a/Lib/idlelib/IOBinding.py
+++ b/Lib/idlelib/IOBinding.py
@@ -209,7 +209,7 @@
                 # gets set to "not modified" at every new prompt.
                 try:
                     interp = self.editwin.interp
-                except:
+                except AttributeError:
                     interp = None
                 if not self.filename and self.get_saved() and not interp:
                     self.editwin.flist.open(filename, self.loadfile)