diff --git a/hoot-core/src/main/cpp/hoot/core/conflate/polygon/BuildingMatch.h b/hoot-core/src/main/cpp/hoot/core/conflate/polygon/BuildingMatch.h
index 88a786a..06888c8 100644
--- a/hoot-core/src/main/cpp/hoot/core/conflate/polygon/BuildingMatch.h
+++ b/hoot-core/src/main/cpp/hoot/core/conflate/polygon/BuildingMatch.h
@@ -69,7 +69,9 @@ public:
/**
* Building matches never conflict other building matches, but conflict with everything else.
*/
- virtual bool isConflicting(const ConstMatchPtr& other, const ConstOsmMapPtr& map) const override;
+ virtual bool isConflicting(
+ const ConstMatchPtr& other, const ConstOsmMapPtr& map,
+ const QHash<QString, ConstMatchPtr>& matches = QHash<QString, ConstMatchPtr>()) const override;
/**
* Simply returns the two elements that were matched.