diff --git a/spynnaker/pyNN/extra_algorithms/delay_support_adder.py b/spynnaker/pyNN/extra_algorithms/delay_support_adder.py
index b1fc1f10f2..9d4969b552 100644
--- a/spynnaker/pyNN/extra_algorithms/delay_support_adder.py
+++ b/spynnaker/pyNN/extra_algorithms/delay_support_adder.py
@@ -34,8 +34,6 @@ def delay_support_adder() -> Tuple[
     splitter objects have been set.
 
     :return: The delay vertices and delay edges that were added
-    :rtype: tuple(list(DelayExtensionVertex), list(DelayedApplicationEdge or
-        DelayAfferentApplicationEdge, str))
     """
     adder = _DelaySupportAdder()
     # pylint: disable=protected-access