diff --git a/src/dsnotificationinterface.cpp b/src/dsnotificationinterface.cpp
index cb0e44e21bcb4..e5b7613650cf6 100644
--- a/src/dsnotificationinterface.cpp
+++ b/src/dsnotificationinterface.cpp
@@ -79,7 +79,7 @@ void CDSNotificationInterface::UpdatedBlockTip(const CBlockIndex *pindexNew, con
     if (pindexNew == pindexFork) // blocks were disconnected without any new ones
         return;
 
-    m_mn_sync.UpdatedBlockTip(m_chainman.m_best_header, pindexNew, fInitialDownload);
+    m_mn_sync.UpdatedBlockTip(WITH_LOCK(::cs_main, return m_chainman.m_best_header), pindexNew, fInitialDownload);
 
     // Update global DIP0001 activation status
     fDIP0001ActiveAtTip = pindexNew->nHeight >= Params().GetConsensus().DIP0001Height;