diff --git a/app/indices/group_index.rb b/app/indices/group_index.rb
index 432d5f3f11..16d87aca00 100644
--- a/app/indices/group_index.rb
+++ b/app/indices/group_index.rb
@@ -8,7 +8,13 @@ module GroupIndex; end
 ThinkingSphinx::Index.define_partial :group do
   indexes name, short_name, sortable: true
   indexes email, zip_code, town, country
-  indexes address_care_of, street, housenumber, postbox
+
+  # Somehow, these 4 columns are not recognized automatically
+  indexes "#{Group.table_name}.address_care_of", as: :address_care_of
+  indexes "#{Group.table_name}.street", as: :street
+  indexes "#{Group.table_name}.housenumber", as: :housenumber
+  indexes "#{Group.table_name}.postbox", as: :postbox
+
   indexes address # TODO: remove when cleaning structured_addresses migration
 
   indexes parent.name, as: :parent_name
@@ -17,5 +23,6 @@ module GroupIndex; end
   indexes social_accounts.name, as: :social_account
   indexes additional_emails.email, as: :additional_email
 
+  # this is inserted verbatim and not auto-quoted
   where "#{Group.quoted_table_name}.deleted_at IS NULL"
 end
diff --git a/app/indices/person_index.rb b/app/indices/person_index.rb
index 2ffbff7b26..35a8dfd513 100644
--- a/app/indices/person_index.rb
+++ b/app/indices/person_index.rb
@@ -7,7 +7,13 @@ module PersonIndex; end
 
 ThinkingSphinx::Index.define_partial :person do
   indexes first_name, last_name, company_name, nickname, company, email, sortable: true
-  indexes address_care_of, street, housenumber, postbox
+
+  # Somehow, these 4 columns are not recognized automatically
+  indexes "#{Person.table_name}.address_care_of", as: :address_care_of
+  indexes "#{Person.table_name}.street", as: :street
+  indexes "#{Person.table_name}.housenumber", as: :housenumber
+  indexes "#{Person.table_name}.postbox", as: :postbox
+
   indexes address # TODO: remove when cleaning structured_addresses migration
   indexes zip_code, town, country, additional_information