diff --git a/pcbnew/dialogs/dialog_export_idf.cpp b/pcbnew/dialogs/dialog_export_idf.cpp
index 0f5ebe7451..ae693ced78 100644
--- a/pcbnew/dialogs/dialog_export_idf.cpp
+++ b/pcbnew/dialogs/dialog_export_idf.cpp
@@ -195,9 +195,8 @@ void PCB_EDIT_FRAME::OnExportIDF3( wxCommandEvent& event )
     if( dlg.GetAutoAdjustOffset() )
     {
         BOX2I bbox = GetBoard()->GetBoardEdgesBoundingBox();
-
-        aXRef = bbox.Centre().x * pcbIUScale.MM_PER_IU;
-        aYRef = bbox.Centre().y * pcbIUScale.MM_PER_IU;
+        aXRef = pcbIUScale.IUTomm( bbox.GetCenter().x );
+        aYRef = pcbIUScale.IUTomm( bbox.GetCenter().y );
     }
     else
     {
diff --git a/pcbnew/dialogs/dialog_export_vrml.cpp b/pcbnew/dialogs/dialog_export_vrml.cpp
index 54bd605c59..4e877a0788 100644
--- a/pcbnew/dialogs/dialog_export_vrml.cpp
+++ b/pcbnew/dialogs/dialog_export_vrml.cpp
@@ -230,10 +230,9 @@ void PCB_EDIT_FRAME::OnExportVRML( wxCommandEvent& event )
     if( dlg.GetOriginChoice() == 1 )
     {
         // Origin = board center:
-        BOARD* pcb = GetBoard();
-        VECTOR2I center = pcb->GetBoundingBox().GetCenter();
-        aXRef = pcbIUScale.IUTomm( center.x );
-        aYRef = pcbIUScale.IUTomm( center.y );
+        BOX2I  bbox = GetBoard()->GetBoardEdgesBoundingBox();
+        aXRef = pcbIUScale.IUTomm( bbox.GetCenter().x );
+        aYRef = pcbIUScale.IUTomm( bbox.GetCenter().y );
     }
 
     double scale = scaleList[dlg.GetUnits()];     // final scale export