diff --git a/TODO b/TODO
index f350f75..ce96217 100644
--- a/TODO
+++ b/TODO
@@ -270,6 +270,10 @@ Comments appear in the code prefixed by "ABI". Always Search for ABI
 in source and header files to find items not listed here. Also search
 for "[[deprecated" to find deprecated APIs that can be removed.
 
+* As long as QPDF disallows copying, its Members could be a unique_ptr
+  instead of a shared_ptr. There may be other classes that could also
+  be converted.
+
 
 Page splitting/merging
 ======================