diff --git a/scripts/roll.sh b/scripts/roll.sh
index bacaacf50..06f0d997d 100644
--- a/scripts/roll.sh
+++ b/scripts/roll.sh
@@ -41,6 +41,7 @@ perl -pi -e 's%../../../doc/html/bbv2.installation.html%doc/html/bbv2.installati
 find . -name CVS | xargs rm -rf
 rm roll.sh
 chmod a+x jam_src/build.bat
+date >> timestamp.txt
 cd .. && zip -r boost-build.zip boost-build && tar --bzip2 -cf boost-build.tar.bz2 boost-build
 cd boost-build