diff --git a/hoot-core/src/main/cpp/hoot/core/conflate/highway/HighwaySnapMerger.h b/hoot-core/src/main/cpp/hoot/core/conflate/highway/HighwaySnapMerger.h
index 60b8c01..f99e02b 100644
--- a/hoot-core/src/main/cpp/hoot/core/conflate/highway/HighwaySnapMerger.h
+++ b/hoot-core/src/main/cpp/hoot/core/conflate/highway/HighwaySnapMerger.h
@@ -104,6 +104,8 @@ private:
bool _doesWayConnect(long node1, long node2, const ConstWayPtr& w) const;
+ void _updateScrapParent(const OsmMapPtr& map, long id, const ElementPtr& scrap);
+
// for white box testing.
friend class HighwaySnapMergerTest;
};