1 files changed, 2 insertions, 0 deletions
diff --git a/TODO b/TODO
index c03285b4..4af777c3 100644
--- a/TODO
+++ b/TODO
@@ -180,6 +180,8 @@ ABI Changes
 This is a list of changes to make next time there is an ABI change.
 Comments appear in the code prefixed by "ABI"
 
+* See where anonymous namespaces can be used to keep things private to
+  a source file. Search for `(class|struct)` in **/*.cc.
 * Search for ABI to find items not listed here.
 * Merge two versions of QPDFObjectHandle::makeDirect per comment
 * After removing legacy QPDFNameTreeObjectHelper and