diff --git a/Lib/idlelib/AutoComplete.py b/Lib/idlelib/AutoComplete.py
index fa1733f9a6e..519099033f9 100644
--- a/Lib/idlelib/AutoComplete.py
+++ b/Lib/idlelib/AutoComplete.py
@@ -190,7 +190,7 @@ class AutoComplete:
                     bigl = eval("dir()", namespace)
                     bigl.sort()
                     if "__all__" in bigl:
-                        smalll = eval("__all__", namespace)
+                        smalll = list(eval("__all__", namespace))
                         smalll.sort()
                     else:
                         smalll = [s for s in bigl if s[:1] != '_']
@@ -200,7 +200,7 @@ class AutoComplete:
                         bigl = dir(entity)
                         bigl.sort()
                         if "__all__" in bigl:
-                            smalll = entity.__all__
+                            smalll = list(entity.__all__)
                             smalll.sort()
                         else:
                             smalll = [s for s in bigl if s[:1] != '_']
diff --git a/Misc/NEWS b/Misc/NEWS
index 36b4f0a7142..2982ca0066f 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -90,6 +90,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #13933: IDLE auto-complete did not work with some imported
+  module, like hashlib.  (Patch by Roger Serwy)
+
 - Issue #13901: Prevent test_distutils failures on OS X with --enable-shared.
 
 - Issue #13676: Handle strings with embedded zeros correctly in sqlite3.