Fix syntax error

[ehennestad]

Motivation

Fix syntax error. Can cause problems when compiling code (i.e #564 ) or packaging to MATLAB toolbox (mltbx file).

How to test the behavior?

N/A

Checklist

• Have you ensured the PR description clearly describes the problem and solutions?
• Have you checked to ensure that there aren't other open or previously closed Pull Requests for the same change?
• If this PR fixes an issue, is the first line of the PR description fix #XX where XX is the issue number?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.63%. Comparing base (bc4b87d) to head (4a2133b).
Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #609   +/-   ##
=======================================
  Coverage   90.63%   90.63%           
=======================================
  Files         106      106           
  Lines        4686     4686           
=======================================
  Hits         4247     4247           
  Misses        439      439           

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