diff --git a/modules/client/sync/presence.cc b/modules/client/sync/presence.cc
index 45fa919bd..84384d293 100644
--- a/modules/client/sync/presence.cc
+++ b/modules/client/sync/presence.cc
@@ -153,5 +153,6 @@ ircd::m::sync::presence_polylog(data &data)
 		parallel();
 	});
 
+	parallel.wait_done();
 	return ret;
 }
diff --git a/modules/client/sync/rooms/state.cc b/modules/client/sync/rooms/state.cc
index 47eda8e6c..2bfcc5e71 100644
--- a/modules/client/sync/rooms/state.cc
+++ b/modules/client/sync/rooms/state.cc
@@ -135,5 +135,6 @@ ircd::m::sync::room_state_polylog_events(data &data)
 			parallel(event_idx);
 	});
 
+	parallel.wait_done();
 	return ret;
 }