diff --git a/argcomplete/packages/_argparse.py b/argcomplete/packages/_argparse.py
index 7a8b4fc8..2a064f9a 100644
--- a/argcomplete/packages/_argparse.py
+++ b/argcomplete/packages/_argparse.py
@@ -162,7 +162,10 @@ def take_action(action, argument_strings, option_string=None):
         def consume_optional(start_index):
             # get the optional identified at this index
             option_tuple = option_string_indices[start_index]
-            action, option_string, explicit_arg = option_tuple
+            if len(option_tuple) == 3:
+                action, option_string, explicit_arg = option_tuple
+            else:  # Python 3.11.9+, 3.12.3+, 3.13+
+                action, option_string, _, explicit_arg = option_tuple
 
             # identify additional optionals in the same arg string
             # (e.g. -xyz is the same as -x -y -z if no args are required)