diff --git a/node/Node.cpp b/node/Node.cpp
index 8e00071fd..1dbb6d19d 100644
--- a/node/Node.cpp
+++ b/node/Node.cpp
@@ -311,8 +311,8 @@ ZT1_ResultCode Node::processBackgroundTasks(uint64_t now,volatile uint64_t *next
 ZT1_ResultCode Node::join(uint64_t nwid)
 {
 	Mutex::Lock _l(_networks_m);
-	std::vector< SharedPtr<Network> >::const_iterator nwi = std::lower_bound(_networks.begin(), _networks.end(), nwid, NetworkComparator());
-	if(nwi == _networks.end() || (*nwi)->id() != nwid) {
+	SharedPtr<Network> nw = _network(nwid);
+	if(!nw) {
 		_networks.push_back(SharedPtr<Network>(new Network(RR,nwid)));
 		std::sort(_networks.begin(),_networks.end());
 	}
@@ -412,10 +412,10 @@ ZT1_PeerList *Node::peers() const
 ZT1_VirtualNetworkConfig *Node::networkConfig(uint64_t nwid) const
 {
 	Mutex::Lock _l(_networks_m);
-	std::vector< SharedPtr<Network> >::const_iterator nwi = std::lower_bound(_networks.begin(), _networks.end(), nwid, NetworkComparator());
-	if(nwi != _networks.end() && (*nwi)->id() == nwid) {
+	SharedPtr<Network> nw = _network(nwid);
+	if(nw) {
 		ZT1_VirtualNetworkConfig *nc = (ZT1_VirtualNetworkConfig *)::malloc(sizeof(ZT1_VirtualNetworkConfig));
-		(*nwi)->externalConfig(nc);
+		nw->externalConfig(nc);
 		return nc;
 	}
 	return (ZT1_VirtualNetworkConfig *)0;
diff --git a/node/Node.hpp b/node/Node.hpp
index 6ef306eb5..b0f4ab222 100644
--- a/node/Node.hpp
+++ b/node/Node.hpp
@@ -158,12 +158,7 @@ public:
 	inline SharedPtr<Network> network(uint64_t nwid) const
 	{
 		Mutex::Lock _l(_networks_m);
-		std::vector< SharedPtr<Network> >::const_iterator iter = std::lower_bound(_networks.begin(), _networks.end(), nwid, NetworkComparator());
-		if(iter != _networks.end() && (*iter)->id() == nwid) {
-			return *iter;
-		} else {
-			return SharedPtr<Network>();
-		}
+		return _network(nwid);
 	}
 
 	inline std::vector< SharedPtr<Network> > allNetworks() const
@@ -217,6 +212,16 @@ private:
 		}
 	};
 
+	inline SharedPtr<Network> _network(uint64_t nwid) const
+	{
+		std::vector< SharedPtr<Network> >::const_iterator iter = std::lower_bound(_networks.begin(), _networks.end(), nwid, NetworkComparator());
+		if(iter != _networks.end() && (*iter)->id() == nwid) {
+			return *iter;
+		} else {
+			return SharedPtr<Network>();
+		}
+	}
+
 	RuntimeEnvironment _RR;
 	RuntimeEnvironment *RR;