diff --git a/src/include/multi_array_operation.cc.h b/src/include/multi_array_operation.cc.h
index 58dfc48..723936d 100644
--- a/src/include/multi_array_operation.cc.h
+++ b/src/include/multi_array_operation.cc.h
@@ -98,7 +98,7 @@ namespace MultiArrayTools
     }
 
     template <typename T, class OperationClass>
-    template <template <class,class> class AOp, class... Indices>
+    template <template <class> class AOp, class... Indices>
     auto OperationBase<T,OperationClass>::oto(const std::shared_ptr<Indices>&... inds) const
 	-> MultiArray<T,typename Indices::RangeType...>
     {
diff --git a/src/include/multi_array_operation.h b/src/include/multi_array_operation.h
index 3137df5..7be4d8a 100644
--- a/src/include/multi_array_operation.h
+++ b/src/include/multi_array_operation.h
@@ -69,7 +69,7 @@ namespace MultiArrayTools
 	auto to(const std::shared_ptr<Indices>&... inds) const
 	    -> MultiArray<T,typename Indices::RangeType...>;
 
-        template <template <class,class> class AOp, class... Indices>
+        template <template <class> class AOp, class... Indices>
 	auto oto(const std::shared_ptr<Indices>&... inds) const
 	    -> MultiArray<T,typename Indices::RangeType...>;