diff --git a/p2p/discover/table.go b/p2p/discover/table.go
index bb5ab4f3fc..8045f1389e 100644
--- a/p2p/discover/table.go
+++ b/p2p/discover/table.go
@@ -452,7 +452,9 @@ func (tab *Table) loadSeedNodes() {
 			addr, _ := seed.UDPEndpoint()
 			tab.log.Trace("Found seed node in database", "id", seed.ID(), "addr", addr, "age", age)
 		}
+		tab.mutex.Lock()
 		tab.handleAddNode(addNodeOp{node: seed, isInbound: false})
+		tab.mutex.Unlock()
 	}
 }