diff --git a/include/contractor/contractor_heap.hpp b/include/contractor/contractor_heap.hpp
index 77a0a85af..fc581f3b0 100644
--- a/include/contractor/contractor_heap.hpp
+++ b/include/contractor/contractor_heap.hpp
@@ -20,8 +20,7 @@ using ContractorHeap = util::QueryHeap<NodeID,
                                        NodeID,
                                        EdgeWeight,
                                        ContractorHeapData,
-                                       util::XORFastHashStorage<NodeID, NodeID>,
-                                       false>;
+                                       util::XORFastHashStorage<NodeID, NodeID>>;
 
 } // namespace osrm::contractor
 
diff --git a/include/util/pool_allocator.hpp b/include/util/pool_allocator.hpp
index 23b8737db..6d4eaffa4 100644
--- a/include/util/pool_allocator.hpp
+++ b/include/util/pool_allocator.hpp
@@ -63,6 +63,15 @@ template <typename T, size_t MinItemsInBlock = 1024> class PoolAllocator
         }
     }
 
+    PoolAllocator(const PoolAllocator &) {}
+
+    PoolAllocator &operator=(const PoolAllocator &){return *this;}
+
+    // You may also want to implement move semantics if needed
+    PoolAllocator(PoolAllocator &&) noexcept = default;
+    PoolAllocator &operator=(PoolAllocator &&) noexcept = default;
+
+
   private:
     size_t get_next_power_of_two_exponent(size_t n) const
     {