diff --git a/src/protocol.cpp b/src/protocol.cpp
index 6476d3b6c..5b105dbbe 100644
--- a/src/protocol.cpp
+++ b/src/protocol.cpp
@@ -42,11 +42,13 @@ const char *SPORK="spork";
 const char *GETSPORKS="getsporks";
 const char *MNWINNER="mnw";
 const char *MNWINNERSSYNC="mnget";
+const char *MNSCANERROR="mn scan error"; // not implemented
 const char *MNGOVERNANCEVOTESYNC="mnvs";
 const char *MNGOVERNANCEVOTE="mvote";
 const char *MNGOVERNANCEPROPOSAL="mprop";
 const char *MNGOVERNANCEFINAL="fbs";
 const char *MNGOVERNANCEFINALVOTE="fbvote";
+const char *MNQUORUM="mn quorum"; // not implemented
 const char *MNANNOUNCE="mnb";
 const char *MNPING="mnp";
 const char *DSACCEPT="dsa";
@@ -72,10 +74,12 @@ static const char* ppszTypeName[] =
     NetMsgType::IXLOCKVOTE,
     NetMsgType::SPORK,
     NetMsgType::MNWINNER,
+    NetMsgType::MNSCANERROR, // not implemented
     NetMsgType::MNGOVERNANCEVOTE,
     NetMsgType::MNGOVERNANCEPROPOSAL,
     NetMsgType::MNGOVERNANCEFINAL,
     NetMsgType::MNGOVERNANCEFINALVOTE,
+    NetMsgType::MNQUORUM, // not implemented
     NetMsgType::MNANNOUNCE,
     NetMsgType::MNPING,
     NetMsgType::DSTX
diff --git a/src/protocol.h b/src/protocol.h
index 5dcbe3615..81809d88e 100644
--- a/src/protocol.h
+++ b/src/protocol.h
@@ -345,12 +345,12 @@ enum {
     MSG_TXLOCK_VOTE,
     MSG_SPORK,
     MSG_MASTERNODE_WINNER,
-    MSG_MASTERNODE_SCANNING_ERROR,
+    MSG_MASTERNODE_SCANNING_ERROR, // not implemented
     MSG_BUDGET_VOTE,
     MSG_BUDGET_PROPOSAL,
     MSG_BUDGET_FINALIZED,
     MSG_BUDGET_FINALIZED_VOTE,
-    MSG_MASTERNODE_QUORUM,
+    MSG_MASTERNODE_QUORUM, // not implemented
     MSG_MASTERNODE_ANNOUNCE,
     MSG_MASTERNODE_PING,
     MSG_DSTX