diff --git a/syncpackage b/syncpackage
index 7d87a55..eb43072 100755
--- a/syncpackage
+++ b/syncpackage
@@ -310,6 +310,7 @@ def fetch_source_pkg(package, dist, version, component, ubuntu_release, mirror):
                                mirrors=mirrors)
 
 def copy(src_pkg, release, simulate=False, force=False):
+    """Copy a source package from Debian to Ubuntu using the Launchpad API."""
     ubuntu = Distribution('ubuntu')
     debian_archive = Distribution('debian').getArchive()
     ubuntu_archive = ubuntu.getArchive()