diff --git a/TODO b/TODO
index 00b2e3c..51de2d7 100644
--- a/TODO
+++ b/TODO
@@ -23,6 +23,10 @@ Misc
   encryption dictionary normally.
 * Have a warn in QPDF that passes its variable arguments onto QPDFExc
   so you don't have to do warn(QPDFExc(...))
+* Find all places in the code that write to std::cout, std::err,
+  stdout, or stderr to make sure they obey default output stream
+  settings for QPDF and QPDFJob. This probably includes adding a
+  Pl_Ostream pipeline.
 * Nice to have:
   * Split qpdf.test into multiple tests
   * Rework tests so that nothing is written into the source directory.