diff --git a/samples/wrapper/wrapper.cpp b/samples/wrapper/wrapper.cpp
index 54971e460f..5512e6134b 100644
--- a/samples/wrapper/wrapper.cpp
+++ b/samples/wrapper/wrapper.cpp
@@ -416,7 +416,9 @@ void do_zip_outputs() {
     }
 }
 
-// if any zipped input files are present, unzip and remove them
+// rename/move output files usefull for large files that are alreay in the project directory
+// The logical name of the output file "foo" must be specified as "foo.link" in the result template
+// and "foo" should be a softlink, see usage of boinc_resolve() in job.xml
 //
 void do_rename_outputs() {
     for (unsigned int i=0; i<rename_output_filenames.size(); i++) {