diff --git a/src/net_processing.cpp b/src/net_processing.cpp
index a6a8814df..9f950831c 100644
--- a/src/net_processing.cpp
+++ b/src/net_processing.cpp
@@ -70,7 +70,7 @@ struct COrphanTx {
     NodeId fromPeer;
     int64_t nTimeExpire;
 };
-static CCriticalSection g_cs_orphans;
+CCriticalSection g_cs_orphans;
 std::map<uint256, COrphanTx> mapOrphanTransactions GUARDED_BY(g_cs_orphans);
 
 void EraseOrphansFor(NodeId peer);
diff --git a/src/test/denialofservice_tests.cpp b/src/test/denialofservice_tests.cpp
index fdf7397bf..52bbe96b9 100644
--- a/src/test/denialofservice_tests.cpp
+++ b/src/test/denialofservice_tests.cpp
@@ -31,7 +31,8 @@ struct COrphanTx {
     NodeId fromPeer;
     int64_t nTimeExpire;
 };
-extern std::map<uint256, COrphanTx> mapOrphanTransactions;
+extern CCriticalSection g_cs_orphans;
+extern std::map<uint256, COrphanTx> mapOrphanTransactions GUARDED_BY(g_cs_orphans);
 
 static CService ip(uint32_t i)
 {
@@ -324,7 +325,7 @@ BOOST_AUTO_TEST_CASE(DoS_bantime)
 static CTransactionRef RandomOrphan()
 {
     std::map<uint256, COrphanTx>::iterator it;
-    LOCK(cs_main);
+    LOCK2(cs_main, g_cs_orphans);
     it = mapOrphanTransactions.lower_bound(InsecureRand256());
     if (it == mapOrphanTransactions.end())
         it = mapOrphanTransactions.begin();
@@ -394,7 +395,7 @@ BOOST_AUTO_TEST_CASE(DoS_mapOrphans)
         BOOST_CHECK(!AddOrphanTx(MakeTransactionRef(tx), i));
     }
 
-    LOCK(cs_main);
+    LOCK2(cs_main, g_cs_orphans);
     // Test EraseOrphansFor:
     for (NodeId i = 0; i < 3; i++)
     {