diff --git a/contrib/other-builds/moses2/Search/CubePruning/Stack.cpp b/contrib/other-builds/moses2/Search/CubePruning/Stack.cpp
index 237051537..b8a2c75f5 100644
--- a/contrib/other-builds/moses2/Search/CubePruning/Stack.cpp
+++ b/contrib/other-builds/moses2/Search/CubePruning/Stack.cpp
@@ -82,15 +82,14 @@ void MiniStack::SortAndPruneHypos(const Manager &mgr) const
 ///////////////////////////////////////////////////////////////
 Stack::Stack(const Manager &mgr)
 {
-  //MemPool &pool = mgr.GetPool();
+  MemPool &pool = mgr.GetPool();
   //cerr << "Coll=" << sizeof(Coll) << endl;
 
-  //alloc = new MemPoolAllocator< std::pair<HypoCoverage const, MiniStack> > (mgr.GetPool());
-  m_coll = new Coll();
-}
+	alloc = new MemPoolAllocator< std::pair<HypoCoverage const, MiniStack> > (pool);
+	m_coll = new (pool.Allocate<Coll>()) Coll(*alloc);}
 
 Stack::~Stack() {
-  delete m_coll;
+  delete alloc;
 }
 
 void Stack::Add(const Hypothesis *hypo, Recycler<Hypothesis*> &hypoRecycle)
diff --git a/contrib/other-builds/moses2/Search/CubePruning/Stack.h b/contrib/other-builds/moses2/Search/CubePruning/Stack.h
index 8286805bc..cb08a77c1 100644
--- a/contrib/other-builds/moses2/Search/CubePruning/Stack.h
+++ b/contrib/other-builds/moses2/Search/CubePruning/Stack.h
@@ -62,8 +62,8 @@ public:
   typedef boost::unordered_map<HypoCoverage,
 		  MiniStack,
 		  boost::hash<HypoCoverage>,
-		  std::equal_to<HypoCoverage>
-    // MemPoolAllocator< std::pair<HypoCoverage const, MiniStack> >
+		  std::equal_to<HypoCoverage>,
+  	  	  MemPoolAllocator< std::pair<HypoCoverage const, MiniStack> >
 		  > Coll;
 
 
@@ -84,7 +84,7 @@ public:
 	}
 
 protected:
-	//MemPoolAllocator< std::pair<HypoCoverage const, MiniStack> > *alloc;
+	MemPoolAllocator< std::pair<HypoCoverage const, MiniStack> > *alloc;
 	Coll *m_coll;
 
 	StackAdd Add(const Hypothesis *hypo);