diff --git a/libsrc/core/array.hpp b/libsrc/core/array.hpp
index df28b098..90018182 100644
--- a/libsrc/core/array.hpp
+++ b/libsrc/core/array.hpp
@@ -749,15 +749,16 @@ namespace ngcore
     NETGEN_INLINE explicit Array (const Array & a2)
       : FlatArray<T,IndexType> (a2.Size(), a2.Size() ? new T[a2.Size()] : nullptr)
     {
-      if constexpr (std::is_copy_assignable<T>::value)
+      static_assert(std::is_copy_assignable<T>::value, "cannot copy-construct Array");
+      // if constexpr (std::is_copy_assignable<T>::value)
         {
           allocsize = size;
           mem_to_delete = data;
           for (size_t i = 0; i < size; i++)
             data[i] = a2.data[i];
         }
-      else
-        throw Exception(std::string("cannot copy-construct Array of type ") + typeid(T).name());        
+      // else
+      // throw Exception(std::string("cannot copy-construct Array of type ") + typeid(T).name());        
     }