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I have a bibliography in biblatex and I want to use different fonts than Computer Modern, namely Lato & Bitstream Charter. Here is a minimal example:


\usepackage[defaultsans, scale=0.9]{lato}

  author = {Shannon, C. E.},
  title = {A mathematical theory of communication},
  journal = {SIGMOBILE Mob. Comput. Commun. Rev.},
  issue_date = {January 2001},
  volume = {5},
  number = {1},
  month = jan,
  year = {2001},
  issn = {1559-1662},
  pages = {3--55},
  numpages = {53},
  url = {http://doi.acm.org/10.1145/584091.584093},
  doi = {10.1145/584091.584093},
  acmid = {584093},
  publisher = {ACM},
  address = {New York, NY, USA},





This results in the following output after running biber and pdflatex:


The red arrows indicate my problem: Because Bitstream Charter has no actual small caps, LaTeX simply shrinks the characters for acronyms like ISSN and I don't like how this looks. So my question is: How can I change the font such that acronyms are simply displayed regularly?

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up vote 11 down vote accepted

You need to change the macro \mkbibacro. Its original definition is


so a somewhat brute-force approach (replacing small caps with "typeset as-is" (here: capitals) for all fonts) would be


A better way is to trick biblatex into thinking that Mathdesign/Bitstream Charter doesn't feature small caps. Add the following to your preamble:


enter image description here

Note: The "font shorthand" mdbch for Mathdesign/Bitstream Charter can be detected by adding \show\rmdefault to the OP's example.

share|improve this answer
Works great, thank you! – Patrick Oscity Jun 5 '12 at 12:28
Would you mind to clarify why "trick" is better? A "brute-force" approach seems shorter. – mlt Jun 4 '14 at 6:33
@mlt The brute-force method will always result in capitals, even if you switch to a font that features small caps. – lockstep Jun 4 '14 at 6:50
@lockstep Thank you. I actually was looking for lowercase "doi" in a regular font and I settled on \renewcommand*{\mkbibacro}[1]{\MakeLowercase{#1}} and \urlstyle{same}. – mlt Jun 4 '14 at 14:15

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