diff --git a/lib/activerecord-postgres-earthdistance/acts_as_geolocated.rb b/lib/activerecord-postgres-earthdistance/acts_as_geolocated.rb
index ebfd2c4..fd1dac9 100644
--- a/lib/activerecord-postgres-earthdistance/acts_as_geolocated.rb
+++ b/lib/activerecord-postgres-earthdistance/acts_as_geolocated.rb
@@ -2,7 +2,6 @@ module ActiveRecordPostgresEarthdistance
   MILES_TO_METERS_FACTOR = 1609.344
   module ActsAsGeolocated
     extend ActiveSupport::Concern
-    
 
     module ClassMethods  
       def acts_as_geolocated(options = {})
@@ -95,7 +94,7 @@ def self.quote_value(value)
   module QueryMethods
     def selecting_distance_from(lat, lng, name = "distance", include_default_columns = true)
       clone.tap do |relation|
-        relation.joins!(through_table)
+        relation.joins!(through_table) if through_table
         values = []
         if relation.select_values.empty? && include_default_columns
           values << relation.arel_table[Arel.star]