diff --git a/spacepackets/ecss/__init__.py b/spacepackets/ecss/__init__.py
index 8244812..e9874a9 100644
--- a/spacepackets/ecss/__init__.py
+++ b/spacepackets/ecss/__init__.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from crcmod.predefined import mkPredefinedCrcFun
 
 from .defs import PusService, PusVersion