diff --git a/src/include/multi_array.cc.h b/src/include/multi_array.cc.h
index ecbf9b1..facf01b 100644
--- a/src/include/multi_array.cc.h
+++ b/src/include/multi_array.cc.h
@@ -73,6 +73,17 @@ namespace MultiArrayTools
 	}
     }
 
+    template <typename T, class... SRanges>
+    template <class... Ranges>
+    MultiArray<T,SRanges...>::MultiArray(const std::shared_ptr<SRanges>&... ranges, MultiArray<T,Ranges...>&& in) :
+	MutableMultiArrayBase<T,SRanges...>(ranges...),
+        mCont( std::move( in.mCont ) )
+    {
+        // maybe some checks here in the future...
+        assert(mCont.size() == MAB::mRange->size());
+	MAB::mInit = true;
+    }
+
     template <typename T, class... SRanges>
     MultiArray<T,SRanges...>::MultiArray(MultiArray<T,AnonymousRange>&& ama, SIZET<SRanges>... sizes) :
 	MutableMultiArrayBase<T,SRanges...>
diff --git a/src/include/multi_array.h b/src/include/multi_array.h
index 1c4e367..955fe44 100644
--- a/src/include/multi_array.h
+++ b/src/include/multi_array.h
@@ -42,7 +42,11 @@ namespace MultiArrayTools
 	MultiArray(const std::shared_ptr<SRanges>&... ranges, const T& val);
 	MultiArray(const std::shared_ptr<SRanges>&... ranges, const vector<T>& vec);
 	MultiArray(const std::shared_ptr<SRanges>&... ranges, vector<T>&& vec);
-	MultiArray(const typename CRange::Space& space);
+
+        template <class... Ranges>
+	MultiArray(const std::shared_ptr<SRanges>&... ranges, MultiArray<T,Ranges...>&& in); // same effect as format
+
+        MultiArray(const typename CRange::Space& space);
 	MultiArray(const typename CRange::Space& space, vector<T>&& vec);
 	MultiArray(MultiArray<T,AnonymousRange>&& ama, SIZET<SRanges>... sizes);