diff --git a/src/evo/mnauth.cpp b/src/evo/mnauth.cpp
index 650cfedfbace6d..7eb2e18ce54394 100644
--- a/src/evo/mnauth.cpp
+++ b/src/evo/mnauth.cpp
@@ -51,7 +51,8 @@ void CMNAuth::PushMNAUTH(CNode& peer, CConnman& connman, const CActiveMasternode
 
     mnauth.proRegTxHash = mn_activeman.GetProTxHash();
 
-    mnauth.sig = mn_activeman.Sign(signHash, bls::bls_legacy_scheme.load());
+    // all clients uses basic BLS
+    mnauth.sig = mn_activeman.Sign(signHash, false);
 
     LogPrint(BCLog::NET_NETCONN, "CMNAuth::%s -- Sending MNAUTH, peer=%d\n", __func__, peer.GetId());
     connman.PushMessage(&peer, CNetMsgMaker(peer.GetCommonVersion()).Make(NetMsgType::MNAUTH, mnauth));
@@ -86,7 +87,8 @@ PeerMsgRet CMNAuth::ProcessMessage(CNode& peer, ServiceFlags node_services, CCon
     }
 
     if (!mnauth.sig.IsValid()) {
-        LogPrint(BCLog::NET_NETCONN, "CMNAuth::ProcessMessage -- invalid mnauth for protx=%s with sig=%s\n", mnauth.proRegTxHash.ToString(), mnauth.sig.ToString());
+        LogPrint(BCLog::NET_NETCONN, "CMNAuth::ProcessMessage -- invalid mnauth for protx=%s with sig=%s\n",
+                 mnauth.proRegTxHash.ToString(), mnauth.sig.ToString(false));
         return tl::unexpected{MisbehavingError{100, "invalid mnauth signature"}};
     }
 
@@ -112,7 +114,7 @@ PeerMsgRet CMNAuth::ProcessMessage(CNode& peer, ServiceFlags node_services, CCon
     }
     LogPrint(BCLog::NET_NETCONN, "CMNAuth::%s -- constructed signHash for nVersion %d, peer=%d\n", __func__, peer.nVersion, peer.GetId());
 
-    if (!mnauth.sig.VerifyInsecure(dmn->pdmnState->pubKeyOperator.Get(), signHash)) {
+    if (!mnauth.sig.VerifyInsecure(dmn->pdmnState->pubKeyOperator.Get(), signHash, false)) {
         // Same as above, MN seems to not know its fate yet, so give it a chance to update. If this is a
         // malicious node (DoSing us), it'll get banned soon.
         return tl::unexpected{MisbehavingError{10, "mnauth signature verification failed"}};