diff --git a/doc/paper/taler.tex b/doc/paper/taler.tex
index e060f2427..25770f8b0 100644
--- a/doc/paper/taler.tex
+++ b/doc/paper/taler.tex
@@ -1091,7 +1091,9 @@ perfectly balanced in between frontend and backend.  Nevertheless,
 these experimental results show that computing-related business costs
 will only marginally contribute to the operational costs of the Taler
 payment system.
-
+% FIXME: Say that storage costs dominated?  Are storage costs comparable
+% for a self hosted system?  Didn't we reduce the storage costs with the
+% key generation trick?
 
 
 \section{Discussion}