diff --git a/dak/generate_packages_sources.py b/dak/generate_packages_sources.py
index cf267322e925dd948060fa6e327292f522495226..3e01da2347d8dbe26043e0a3000a869f53d1a651 100755
--- a/dak/generate_packages_sources.py
+++ b/dak/generate_packages_sources.py
@@ -172,7 +172,7 @@ tree "dists/oldstable/non-free"
         # it has errormessages we like to see
         os.environ['GZIP'] = '--rsyncable'
         os.chdir(tmppath)
-        (result, output) = commands.getstatusoutput('apt-ftparchive -o APT::FTPArchive::Contents=off generate %s' % os.path.basename(ac_name))
+        (result, output) = commands.getstatusoutput('apt-ftparchive -o APT::FTPArchive::Contents=off -o APT::FTPArchive::SHA512=off generate %s' % os.path.basename(ac_name))
         sn="a-f %s,%s: " % (suite, arch)
         print sn + output.replace('\n', '\n%s' % (sn))
         return result