diff --git a/src/Memory/UniquePtrList.hpp b/src/Memory/UniquePtrList.hpp
index bcbd44e..10e2369 100644
--- a/src/Memory/UniquePtrList.hpp
+++ b/src/Memory/UniquePtrList.hpp
@@ -50,9 +50,9 @@ namespace ArbUt {
                 throw std::logic_error(ss.str());
             }
 #endif
-            auto item = _vector.at(index);
+            auto item = _vector[index];
             delete item;
-            _vector.erase(index);
+            _vector.erase(item);
         }
 
         inline bool Contains(const BorrowedPtr<ValueT>& value) const {