diff --git a/gerbview/gerbview_frame.h b/gerbview/gerbview_frame.h
index e26780af8f..acb489d8d4 100644
--- a/gerbview/gerbview_frame.h
+++ b/gerbview/gerbview_frame.h
@@ -128,6 +128,12 @@ public:
     ///> @copydoc EDA_DRAW_FRAME::SetGridColor()
     virtual void SetGridColor( COLOR4D aColor ) override;
 
+    const BOX2I GetDocumentExtents() const override
+    {
+        wxASSERT( m_gerberLayout );
+        return m_gerberLayout->ViewBBox();
+    }
+
 protected:
     GERBER_LAYER_WIDGET*    m_LayersManager;