diff --git a/vdirsyncer/cli.py b/vdirsyncer/cli.py
index a703a91..06ef421 100644
--- a/vdirsyncer/cli.py
+++ b/vdirsyncer/cli.py
@@ -234,14 +234,12 @@ def _main(env, file_cfg):
 
         if processes == 1:
             cli_logger.debug('Not using multiprocessing.')
-            _map = map
+            map(_sync_collection, actions)
         else:
             cli_logger.debug('Using multiprocessing.')
             from multiprocessing import Pool
             p = Pool(processes=general.get('processes', 0) or len(actions))
-            _map = p.map
-
-        _map(_sync_collection, actions)
+            p.map_async(_sync_collection, actions).get(10**9)
 
     app.register_command('sync', sync_command)
     app()