diff --git a/pcbnew/router/pns_kicad_iface.cpp b/pcbnew/router/pns_kicad_iface.cpp
index 8971cfef6c..2a7c284e7d 100644
--- a/pcbnew/router/pns_kicad_iface.cpp
+++ b/pcbnew/router/pns_kicad_iface.cpp
@@ -1350,7 +1350,7 @@ bool PNS_KICAD_IFACE_BASE::syncZone( PNS::NODE* aWorld, ZONE* aZone, SHAPE_POLY_
 
 bool PNS_KICAD_IFACE_BASE::syncTextItem( PNS::NODE* aWorld, PCB_TEXT* aText, PCB_LAYER_ID aLayer )
 {
-    if( !IsCopperLayer( aLayer ) )
+    if( !IsKicadCopperLayer( aLayer ) )
         return false;
 
     std::unique_ptr<PNS::SOLID> solid = std::make_unique<PNS::SOLID>();
@@ -1383,7 +1383,7 @@ bool PNS_KICAD_IFACE_BASE::syncGraphicalItem( PNS::NODE* aWorld, PCB_SHAPE* aIte
 {
     if( aItem->GetLayer() == Edge_Cuts
             || aItem->GetLayer() == Margin
-            || IsCopperLayer( aItem->GetLayer() ) )
+            || IsKicadCopperLayer( aItem->GetLayer() ) )
     {
         std::vector<SHAPE*> shapes = aItem->MakeEffectiveShapes();
 
@@ -1436,9 +1436,17 @@ void PNS_KICAD_IFACE_BASE::SetBoard( BOARD* aBoard )
     wxLogTrace( wxT( "PNS" ), wxT( "m_board = %p" ), m_board );
 }
 
-bool PNS_KICAD_IFACE_BASE::IsCopperLayer( int aLayer ) const
+
+bool PNS_KICAD_IFACE_BASE::IsPNSCopperLayer( int aPNSLayer ) const
 {
-    return ::IsCopperLayer( GetBoardLayerFromPNSLayer( aLayer ) );
+    return ::IsCopperLayer( GetBoardLayerFromPNSLayer( aPNSLayer ) );
+}
+
+
+
+bool PNS_KICAD_IFACE_BASE::IsKicadCopperLayer( PCB_LAYER_ID aKicadLayer ) const
+{
+    return ::IsCopperLayer( aKicadLayer );
 }
 
 
diff --git a/pcbnew/router/pns_kicad_iface.h b/pcbnew/router/pns_kicad_iface.h
index 3af38ab5ce..b11d1d6ad1 100644
--- a/pcbnew/router/pns_kicad_iface.h
+++ b/pcbnew/router/pns_kicad_iface.h
@@ -61,7 +61,8 @@ public:
     bool IsFlashedOnLayer( const PNS::ITEM* aItem, int aLayer ) const override;
     bool IsFlashedOnLayer( const PNS::ITEM* aItem, const PNS_LAYER_RANGE& aLayer ) const override;
     bool IsItemVisible( const PNS::ITEM* aItem ) const override { return true; };
-    bool IsCopperLayer( int aLayer ) const override;
+    bool IsPNSCopperLayer( int aPNSLayer ) const override;
+    bool IsKicadCopperLayer( PCB_LAYER_ID aPcbnewLayer ) const;
     void HideItem( PNS::ITEM* aItem ) override {}
     void DisplayItem( const PNS::ITEM* aItem, int aClearance, bool aEdit = false,
                       int aFlags = 0 ) override {}
diff --git a/pcbnew/router/pns_router.h b/pcbnew/router/pns_router.h
index 65cf79ac6e..a838b8015d 100644
--- a/pcbnew/router/pns_router.h
+++ b/pcbnew/router/pns_router.h
@@ -97,7 +97,7 @@ enum DRAG_MODE
     virtual bool IsItemVisible( const PNS::ITEM* aItem ) const = 0;
     virtual bool IsFlashedOnLayer( const PNS::ITEM* aItem, int aLayer ) const = 0;
     virtual bool IsFlashedOnLayer( const PNS::ITEM* aItem, const PNS_LAYER_RANGE& aLayer ) const = 0;
-    virtual bool IsCopperLayer( int aLayer ) const = 0;
+    virtual bool IsPNSCopperLayer( int aPNSLayer ) const = 0;
     virtual void DisplayItem( const ITEM* aItem, int aClearance, bool aEdit = false,
                                     int aFlags = 0 ) = 0;
     virtual void DisplayPathLine( const SHAPE_LINE_CHAIN& aLine, int aImportance ) = 0;
diff --git a/pcbnew/router/pns_tool_base.cpp b/pcbnew/router/pns_tool_base.cpp
index 82d32922a8..303688f84d 100644
--- a/pcbnew/router/pns_tool_base.cpp
+++ b/pcbnew/router/pns_tool_base.cpp
@@ -146,7 +146,7 @@ ITEM* TOOL_BASE::pickSingleItem( const VECTOR2I& aWhere, NET_HANDLE aNet, int aL
             if( !item->IsRoutable() )
                 continue;
 
-            if( !m_iface->IsCopperLayer( item->Layers().Start() ) )
+            if( !m_iface->IsPNSCopperLayer( item->Layers().Start() ) )
                 continue;
 
             if( !m_iface->IsAnyLayerVisible( item->Layers() ) )
diff --git a/pcbnew/router/router_tool.cpp b/pcbnew/router/router_tool.cpp
index a6ca3e88ea..2aa6cf05e5 100644
--- a/pcbnew/router/router_tool.cpp
+++ b/pcbnew/router/router_tool.cpp
@@ -1160,7 +1160,7 @@ bool ROUTER_TOOL::prepareInteractive( VECTOR2D aStartPosition )
     PCB_LAYER_ID    pcbLayer = getStartLayer( m_startItem );
     int             pnsLayer = m_iface->GetPNSLayerFromBoardLayer( pcbLayer );
 
-    if( !IsCopperLayer( pcbLayer ) )
+    if( !::IsCopperLayer( pcbLayer ) )
     {
         editFrame->ShowInfoBarError( _( "Tracks on Copper layers only." ) );
         return false;