Feature update removes permissions with backslash in the name

My permission somehow has backslash in the name and when I'm updating the feature using following command:

drush -y fu foo_feature

Then it's removing these lines from .info file:

-features[user_permission][] = "access for Korea democratic people\'s republic of"
-features[user_permission][] = "access for Lao people\'s democratic republic"

I could remove backslashes from the name, but it doesn't solve the problem, that feature wrongly parsing the names.