Views Exposed Filter for Proximity SQL error

Hello,

I've got a view showing a company directory.

For each company I have an addressfiield and a geofield set to geocode the addressfield using Google Geocoder.

Then I created a proximity exposed filter in my view for the geofield, but no matter which settings I use. I always get this error:

SQLSTATE[42000]: Syntax error or access violation: 1582 Incorrect parameter count in the call to native function 'RADIANS'

Thanks for any help you can offer,