diff --git a/rosidl_generator_type_description/rosidl_generator_type_description/__init__.py b/rosidl_generator_type_description/rosidl_generator_type_description/__init__.py
index ba1c2990a..3e2d23116 100644
--- a/rosidl_generator_type_description/rosidl_generator_type_description/__init__.py
+++ b/rosidl_generator_type_description/rosidl_generator_type_description/__init__.py
@@ -415,6 +415,8 @@ def field_type_capacity(ftype: definition.AbstractType) -> int:
     if isinstance(ftype, definition.AbstractNestedType):
         if isinstance(ftype, definition.Array):
             return ftype.size
+        elif isinstance(ftype, definition.BoundedSequence):
+            return ftype.maximum_size
     return 0