diff --git a/src/include/helper_tools.cc.h b/src/include/helper_tools.cc.h
index 6bc787f..eb3ff4f 100644
--- a/src/include/helper_tools.cc.h
+++ b/src/include/helper_tools.cc.h
@@ -194,7 +194,7 @@ namespace MultiArrayTools
     }
     
     template <typename T, class EC, class Range1, class... RangeTypes>
-    auto anonToDynView(const MultiArray<T,Range1,RangeTypes...,AnonymousRange>& ma)
+    auto anonToDynView(const MultiArrayBase<T,Range1,RangeTypes...,AnonymousRange>& ma)
 	-> ConstSlice<T,Range1,RangeTypes...,DynamicRange<EC>>
     {
 	constexpr size_t LAST = sizeof...(RangeTypes)+1;
@@ -220,7 +220,7 @@ namespace MultiArrayTools
     }
 
     template <typename T, class EC>
-    auto anonToDynView(const MultiArray<T,AnonymousRange>& ma)
+    auto anonToDynView(const MultiArrayBase<T,AnonymousRange>& ma)
 	-> ConstSlice<T,DynamicRange<EC>>
     {
 	DynamicRangeFactory<EC> drf(rptr<0>(ma)->orig());
diff --git a/src/include/helper_tools.h b/src/include/helper_tools.h
index 62d7e67..c7157e3 100644
--- a/src/include/helper_tools.h
+++ b/src/include/helper_tools.h
@@ -89,7 +89,7 @@ namespace MultiArrayTools
 	-> std::shared_ptr<MultiArrayBase<typename MArray::value_type,DynamicRange<EC>>>;
 
     template <typename T, class EC, class Range1, class... RangeTypes>
-    auto anonToDynView(const MultiArray<T,Range1,RangeTypes...,AnonymousRange>& ma)
+    auto anonToDynView(const MultiArrayBase<T,Range1,RangeTypes...,AnonymousRange>& ma)
 	-> ConstSlice<T,Range1,RangeTypes...,DynamicRange<EC>>;
 
     template <typename T, class EC, class Range1, class... RangeTypes>
@@ -97,7 +97,7 @@ namespace MultiArrayTools
 	-> MultiArray<T,Range1,RangeTypes...,AnonymousRange>;
 
     template <typename T, class EC>
-    auto anonToDynView(const MultiArray<T,AnonymousRange>& ma)
+    auto anonToDynView(const MultiArrayBase<T,AnonymousRange>& ma)
 	-> ConstSlice<T,DynamicRange<EC>>;
 
     template <typename T, class EC>
diff --git a/src/include/ranges/anonymous_range.h b/src/include/ranges/anonymous_range.h
index fc6089e..78ac54f 100644
--- a/src/include/ranges/anonymous_range.h
+++ b/src/include/ranges/anonymous_range.h
@@ -66,7 +66,8 @@ namespace MultiArrayTools
 	typedef typename RangeInterface<AnonymousIndex>::IndexType IndexType;
 	typedef GenSingleRange<size_t,SpaceType::ANON,-1> RangeType;
 	typedef size_t MetaType;
-	
+        typedef AnonymousRangeFactory FType;
+        
 	virtual size_t size() const final;
 	virtual size_t dim() const final;