diff --git a/pcbnew/exporters/step/exporter_step.cpp b/pcbnew/exporters/step/exporter_step.cpp
index 0abb1916cd..d87ad39b8d 100644
--- a/pcbnew/exporters/step/exporter_step.cpp
+++ b/pcbnew/exporters/step/exporter_step.cpp
@@ -160,7 +160,7 @@ EXPORTER_STEP::~EXPORTER_STEP()
 }
 
 
-bool EXPORTER_STEP::buildFootprint3DShapes( FOOTPRINT* aFootprint, VECTOR2D aOrigin,
+bool EXPORTER_STEP::buildFootprint3DShapes( FOOTPRINT* aFootprint, const VECTOR2D& aOrigin,
                                             SHAPE_POLY_SET* aClipPolygon )
 {
     bool              hasdata = false;
@@ -446,7 +446,7 @@ bool EXPORTER_STEP::buildFootprint3DShapes( FOOTPRINT* aFootprint, VECTOR2D aOri
 }
 
 
-bool EXPORTER_STEP::buildTrack3DShape( PCB_TRACK* aTrack, VECTOR2D aOrigin )
+bool EXPORTER_STEP::buildTrack3DShape( PCB_TRACK* aTrack, const VECTOR2D& aOrigin )
 {
     bool skipCopper = !m_params.m_ExportTracksVias
                       || ( !m_params.m_NetFilter.IsEmpty()
@@ -581,7 +581,7 @@ void EXPORTER_STEP::buildZones3DShape( VECTOR2D aOrigin, bool aSolderMaskOnly )
 }
 
 
-bool EXPORTER_STEP::buildGraphic3DShape( BOARD_ITEM* aItem, VECTOR2D aOrigin )
+bool EXPORTER_STEP::buildGraphic3DShape( BOARD_ITEM* aItem, const VECTOR2D& aOrigin )
 {
     PCB_LAYER_ID pcblayer = aItem->GetLayer();