diff --git a/bsp_tool/branches/base.py b/bsp_tool/branches/base.py
index b1fe9f5..82e6fa1 100644
--- a/bsp_tool/branches/base.py
+++ b/bsp_tool/branches/base.py
@@ -226,6 +226,7 @@ def as_tuple(self) -> list:
                 _tuple.append(value)
         return [int(x) if f in "bBhHiI" else x for x, f in zip(_tuple, split_format(self._format))]
 
+    # NOTE: will break in python 3.13
     @classmethod
     def as_cpp(cls, one_liner_limit: int = 80) -> str:
         # MappedArray.as_cpp wrapper