diff --git a/pcbnew/connectivity_algo.cpp b/pcbnew/connectivity_algo.cpp
index dbf74a7a5b..06a3616a31 100644
--- a/pcbnew/connectivity_algo.cpp
+++ b/pcbnew/connectivity_algo.cpp
@@ -203,7 +203,7 @@ void CN_CONNECTIVITY_ALGO::markItemNetAsDirty( const BOARD_ITEM* aItem )
     if( aItem->IsConnected() )
     {
         auto citem = static_cast<const BOARD_CONNECTED_ITEM*>( aItem );
-        markNetAsDirty( citem->GetNetCode() );
+        MarkNetAsDirty( citem->GetNetCode() );
     }
     else
     {
@@ -212,7 +212,7 @@ void CN_CONNECTIVITY_ALGO::markItemNetAsDirty( const BOARD_ITEM* aItem )
             auto mod = static_cast <const MODULE*>( aItem );
 
             for( D_PAD* pad = mod->PadsList(); pad; pad = pad->Next() )
-                markNetAsDirty( pad->GetNetCode() );
+                MarkNetAsDirty( pad->GetNetCode() );
         }
     }
 }
@@ -224,6 +224,11 @@ bool CN_CONNECTIVITY_ALGO::Add( BOARD_ITEM* aItem )
 
     switch( aItem->Type() )
     {
+    case PCB_NETINFO_T:
+    {
+        MarkNetAsDirty( static_cast<NETINFO_ITEM*>( aItem )->GetNet() );
+        break;
+    }    
     case PCB_MODULE_T:
         for( auto pad : static_cast<MODULE*>( aItem ) -> Pads() )
         {
@@ -762,7 +767,7 @@ void CN_CONNECTIVITY_ALGO::propagateConnections()
                 if( item->CanChangeNet() )
                 {
                     item->Parent()->SetNetCode( cluster->OriginNet() );
-                    markNetAsDirty( cluster->OriginNet() );
+                    MarkNetAsDirty( cluster->OriginNet() );
                     n_changed++;
                 }
             }
@@ -826,9 +831,9 @@ const CN_CONNECTIVITY_ALGO::CLUSTERS& CN_CONNECTIVITY_ALGO::GetClusters()
 }
 
 
-void CN_CONNECTIVITY_ALGO::markNetAsDirty( int aNet )
+void CN_CONNECTIVITY_ALGO::MarkNetAsDirty( int aNet )
 {
-    if( aNet <= 0 )
+    if( aNet < 0 )
         return;
 
     if( (int) m_dirtyNets.size() <= aNet )
diff --git a/pcbnew/connectivity_algo.h b/pcbnew/connectivity_algo.h
index 31f4d83bce..38e7b5afb8 100644
--- a/pcbnew/connectivity_algo.h
+++ b/pcbnew/connectivity_algo.h
@@ -823,7 +823,6 @@ public:
     bool addConnectedItem( BOARD_CONNECTED_ITEM* aItem );
     bool isDirty() const;
 
-    void markNetAsDirty( int aNet );
     void markItemNetAsDirty( const BOARD_ITEM* aItem );
 
 public:
@@ -838,6 +837,9 @@ public:
 
     bool IsNetDirty( int aNet ) const
     {
+        if( aNet < 0 )
+            return false;
+
         return m_dirtyNets[ aNet ];
     }
 
@@ -883,8 +885,11 @@ public:
 
     CN_PAD_LIST& PadList() { return m_padList; }
 
-    void ForEachAnchor( std::function<void(CN_ANCHOR_PTR)> aFunc );
-    void ForEachItem( std::function<void(CN_ITEM*)> aFunc );
+    void ForEachAnchor(  std::function<void(CN_ANCHOR_PTR)> aFunc );
+    void ForEachItem(  std::function<void(CN_ITEM*)> aFunc );
+
+    void MarkNetAsDirty( int aNet );
+
 };
 
 bool operator<( const CN_ANCHOR_PTR a, const CN_ANCHOR_PTR b );
diff --git a/pcbnew/ratsnest_data.cpp b/pcbnew/ratsnest_data.cpp
index 3fa53c21fd..3e144d1ae2 100644
--- a/pcbnew/ratsnest_data.cpp
+++ b/pcbnew/ratsnest_data.cpp
@@ -235,18 +235,30 @@ public:
         for( int i = prevId; i < id; i++ )
             anchorChains[prevId].push_back( m_allNodes[ i ] );
 
-
-        hed::TRIANGULATION triangulator;
-        triangulator.CreateDelaunay( triNodes.begin(), triNodes.end() );
-        triangulator.GetEdges( triangEdges );
-
-        for( auto e : triangEdges )
+        if( triNodes.size() == 1 )
         {
-            auto    src = m_allNodes[ e->GetSourceNode()->Id() ];
-            auto    dst = m_allNodes[ e->GetTargetNode()->Id() ];
-
+            return mstEdges;
+        }
+        else if( triNodes.size() == 2 )
+        {
+            auto src = m_allNodes[ triNodes[0]->Id() ];
+            auto dst = m_allNodes[ triNodes[1]->Id() ];
             mstEdges.emplace_back( src, dst, getDistance( src, dst ) );
         }
+        else
+        {
+            hed::TRIANGULATION triangulator;
+            triangulator.CreateDelaunay( triNodes.begin(), triNodes.end() );
+            triangulator.GetEdges( triangEdges );
+
+            for( auto e : triangEdges )
+            {
+                auto    src = m_allNodes[ e->GetSourceNode()->Id() ];
+                auto    dst = m_allNodes[ e->GetTargetNode()->Id() ];
+
+                mstEdges.emplace_back( src, dst, getDistance( src, dst ) );
+            }
+        }
 
         for( unsigned int i = 0; i < anchorChains.size(); i++ )
         {