diff --git a/rtgui/batchqueuepanel.cc b/rtgui/batchqueuepanel.cc
index b698ee9d6..bc03c2386 100644
--- a/rtgui/batchqueuepanel.cc
+++ b/rtgui/batchqueuepanel.cc
@@ -322,7 +322,7 @@ void BatchQueuePanel::addBatchQueueJobs(const std::vector<BatchQueueEntry*>& ent
 
 bool BatchQueuePanel::canStartNext ()
 {
-
+    GThreadLock lock;
     if (qStartStop->get_active()) {
         return true;
     } else {