diff --git a/contrib/other-builds/moses2/Search/CubePruningMiniStack/Misc.h b/contrib/other-builds/moses2/Search/CubePruningMiniStack/Misc.h
index 08584fca0..0d78beb56 100644
--- a/contrib/other-builds/moses2/Search/CubePruningMiniStack/Misc.h
+++ b/contrib/other-builds/moses2/Search/CubePruningMiniStack/Misc.h
@@ -74,7 +74,8 @@ public:
 	typedef std::pair<const CubeEdge*, int> SeenPositionItem;
 	typedef boost::unordered_set<SeenPositionItem,
 			boost::hash<SeenPositionItem>,
-			std::equal_to<SeenPositionItem> > SeenPositions;
+			std::equal_to<SeenPositionItem>,
+			MemPoolAllocator<SeenPositionItem> > SeenPositions;
 
 	const Hypotheses &hypos;
 	const InputPath &path;
diff --git a/contrib/other-builds/moses2/Search/CubePruningMiniStack/Search.cpp b/contrib/other-builds/moses2/Search/CubePruningMiniStack/Search.cpp
index d5e53b816..2cff5efc7 100644
--- a/contrib/other-builds/moses2/Search/CubePruningMiniStack/Search.cpp
+++ b/contrib/other-builds/moses2/Search/CubePruningMiniStack/Search.cpp
@@ -31,7 +31,7 @@ Search::Search(Manager &mgr)
 
 ,m_queue(QueueItemOrderer(), std::vector<QueueItem*>() )
 
-,m_seenPositions()
+,m_seenPositions(MemPoolAllocator<CubeEdge::SeenPositionItem>(mgr.GetPool()))
 {
 }