diff --git a/snapshot.bat b/snapshot.bat
index b99c7a6..df13830 100644
--- a/snapshot.bat
+++ b/snapshot.bat
@@ -10,6 +10,9 @@ rem  Must be run in a directory devoted to boost release snapshots
 
 echo Using %BOOST_TRUNK% as boost trunk
 time /t
+pushd %BOOST_TRUNK%
+svn up
+popd
 call %BOOST_TRUNK%\tools\release\snapshot_download_docs.bat
 time /t
 call %BOOST_TRUNK%\tools\release\snapshot_posix.bat