diff --git a/src/net.h b/src/net.h
index 75c05c9cb5d..4e8a96497cf 100644
--- a/src/net.h
+++ b/src/net.h
@@ -703,7 +703,6 @@ public:
     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};