Fix x86 wheels building

[asvetlov]

Fixes #535

[codecov]

Codecov Report

Merging #546 (d1a831f) into master (58ee718) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #546   +/-   ##
=======================================
  Coverage   99.72%   99.72%           
=======================================
  Files           4        4           
  Lines         737      737           
  Branches      165      165           
=======================================
  Hits          735      735           
  Misses          2        2           

Flag	Coverage Δ
unit	99.45% <ø> (ø)

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