diff --git a/util/src/network/discovery.rs b/util/src/network/discovery.rs
index d4f8957023d..b4a4eef9212 100644
--- a/util/src/network/discovery.rs
+++ b/util/src/network/discovery.rs
@@ -119,10 +119,12 @@ impl Discovery {
 	}
 
 	/// Add a new node to discovery table. Pings the node.
-	pub fn add_node(&mut self, e: NodeEntry) {
+	pub fn add_node(&mut self, e: NodeEntry, new: bool) {
 		let endpoint = e.endpoint.clone();
 		self.update_node(e);
-		self.ping(&endpoint);
+		if new {
+			self.ping(&endpoint);
+		}
 	}
 
 	/// Add a list of known nodes to the table.
@@ -549,10 +551,10 @@ mod tests {
 
 		let node1 = Node::from_str("enode://a979fb575495b8d6db44f750317d0f4622bf4c2aa3365d6af7c284339968eef29b69ad0dce72a4d8db5ebb4968de0e3bec910127f134779fbcb0cb6d3331163c@127.0.0.1:7770").unwrap();
 		let node2 = Node::from_str("enode://b979fb575495b8d6db44f750317d0f4622bf4c2aa3365d6af7c284339968eef29b69ad0dce72a4d8db5ebb4968de0e3bec910127f134779fbcb0cb6d3331163c@127.0.0.1:7771").unwrap();
-		discovery1.add_node(NodeEntry { id: node1.id.clone(), endpoint: node1.endpoint.clone() });
-		discovery1.add_node(NodeEntry { id: node2.id.clone(), endpoint: node2.endpoint.clone() });
+		discovery1.add_node(NodeEntry { id: node1.id.clone(), endpoint: node1.endpoint.clone() }, true);
+		discovery1.add_node(NodeEntry { id: node2.id.clone(), endpoint: node2.endpoint.clone() }, true);
 
-		discovery2.add_node(NodeEntry { id: key1.public().clone(), endpoint: ep1.clone() });
+		discovery2.add_node(NodeEntry { id: key1.public().clone(), endpoint: ep1.clone() }, true);
 		discovery2.refresh();
 
 		for _ in 0 .. 10 {
@@ -579,7 +581,7 @@ mod tests {
 		let ep = NodeEndpoint { address: SocketAddr::from_str("127.0.0.1:40446").unwrap(), udp_port: 40447 };
 		let mut discovery = Discovery::new(&key, ep.address.clone(), ep.clone(), 0);
 		for _ in 0..1200 {
-			discovery.add_node(NodeEntry { id: NodeId::random(), endpoint: ep.clone() });
+			discovery.add_node(NodeEntry { id: NodeId::random(), endpoint: ep.clone() }, true);
 		}
 		assert!(Discovery::nearest_node_entries(&NodeId::new(), &discovery.node_buckets).len() <= 16);
 		let removed = discovery.check_expired(true).len();
diff --git a/util/src/network/host.rs b/util/src/network/host.rs
index 6c1598dd13c..e38edb76fe3 100644
--- a/util/src/network/host.rs
+++ b/util/src/network/host.rs
@@ -419,7 +419,7 @@ impl Host {
 
 				self.nodes.write().add_node(n);
 				if let Some(ref mut discovery) = *self.discovery.lock() {
-					discovery.add_node(entry);
+					discovery.add_node(entry, true);
 				}
 			}
 		}
@@ -433,7 +433,7 @@ impl Host {
 		self.nodes.write().add_node(Node::new(entry.id.clone(), entry.endpoint.clone()));
 
 		if let Some(ref mut discovery) = *self.discovery.lock() {
-			discovery.add_node(entry);
+			discovery.add_node(entry, false);
 		}
 
 		Ok(())
@@ -550,7 +550,7 @@ impl Host {
 		if let Some(mut discovery) = discovery {
 			discovery.init_node_list(self.nodes.read().unordered_entries());
 			for n in self.nodes.read().unordered_entries() {
-				discovery.add_node(n.clone());
+				discovery.add_node(n.clone(), false);
 			}
 			*self.discovery.lock() = Some(discovery);
 			io.register_stream(DISCOVERY).expect("Error registering UDP listener");
@@ -788,7 +788,7 @@ impl Host {
 								self.nodes.write().add_node(Node::new(entry.id.clone(), entry.endpoint.clone()));
 								let mut discovery = self.discovery.lock();
 								if let Some(ref mut discovery) = *discovery.deref_mut() {
-									discovery.add_node(entry);
+									discovery.add_node(entry, true);
 								}
 							}
 						}