diff --git a/src/net.h b/src/net.h
--- a/src/net.h
+++ b/src/net.h
@@ -736,7 +736,6 @@
     std::vector<CAddress> vAddrToSend;
     CRollingBloomFilter addrKnown;
     bool fGetAddr{false};
-    std::set<uint256> setKnown;
     int64_t nNextAddrSend GUARDED_BY(cs_sendProcessing){0};
     int64_t nNextLocalAddrSend GUARDED_BY(cs_sendProcessing){0};