# Allow line break in BibLaTeX output

I have an BibLaTeX entry which causes in \printbibliography command a overful hbox. How can I tell BibLaTex that a line break is allowed without a minus symbol?

In my case I have a text like ABC.learning. I want to allow BibLaTex to break the line after the dot.

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Add \discretionary{}{}{} after the period. – egreg Jan 13 '12 at 10:08

ABC.\hspace{0pt}learning