diff --git a/README.fakedata.md b/README.fakedata.md
index 059615b4eff014910a247243e659d0a37dddb035..30a8f12b5c9f7cc3611371465a2867e9dfca161d 100644
--- a/README.fakedata.md
+++ b/README.fakedata.md
@@ -3,7 +3,8 @@ swiftmpifakestepsim
 ===================
 
 The swiftmpifakestepsim program works much like swiftmpistepsim, except that
-it generates fake logs:
+it generates fake sizes messages and can be scaled to run on any number of MPI
+ranks.
 
 ```
 Usage: ./swiftmpifakestepsim [options] nr_messages logfile.dat