diff --git a/src/TNL/Containers/DistributedArray.h b/src/TNL/Containers/DistributedArray.h
index f281e5e3ef9eb232735259de570507561ce462bc..8947c0dab0493e782f8bc9b6f3b57e5baf7628a4 100644
--- a/src/TNL/Containers/DistributedArray.h
+++ b/src/TNL/Containers/DistributedArray.h
@@ -24,6 +24,8 @@ template< typename Value,
           typename Communicator = Communicators::MpiCommunicator >
 class DistributedArray
 {
+   using CommunicationGroup = typename Communicator::CommunicationGroup;
+
 public:
    using ValueType = Value;
    using DeviceType = Device;