--- a/eric6/Utilities/ClassBrowsers/rbclbr.py	Sat Nov 21 19:31:16 2020 +0100
+++ b/eric6/Utilities/ClassBrowsers/rbclbr.py	Sun Nov 22 16:04:59 2020 +0100
@@ -276,7 +276,7 @@
 
     try:
         src = Utilities.readEncodedFile(file)[0]
-    except (UnicodeError, IOError):
+    except (UnicodeError, OSError):
         # can't do anything with this module
         _modules[module] = {}
         return {}