diff --git a/gerbview/gerber_draw_item.cpp b/gerbview/gerber_draw_item.cpp
index d97502f986..1d1cf98774 100644
--- a/gerbview/gerber_draw_item.cpp
+++ b/gerbview/gerber_draw_item.cpp
@@ -387,6 +387,9 @@ const EDA_RECT GERBER_DRAW_ITEM::GetBoundingBox() const
     {
         if( code && code->m_Shape == APT_RECT )
         {
+            if( m_Polygon.OutlineCount() == 0 )
+                ConvertSegmentToPolygon();
+
             if( m_Polygon.OutlineCount() > 0 )
             {
                 auto bb = m_Polygon.BBox();