Liverpool sold the Dutchman to the Bees last year.
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Discussing the move, Van den Berg told Voetbal Primeur: "I had some conversations with (Arne) Slot. But before the preseason started I already indicated to the club that I wanted to leave and play minutes.
"I would be lying if I said I didn't dream of returning to Liverpool one day. I still think about that. But at the moment it was better for my career to take a different path and play a lot.
"I'm doing that now and it allows me to develop as well as possible."
The centre-back has played 25 competitive matches for the London club this season.