diff --git a/app/services/imports/sales_logs_import_service.rb b/app/services/imports/sales_logs_import_service.rb
index e548b8c72..af38106a2 100644
--- a/app/services/imports/sales_logs_import_service.rb
+++ b/app/services/imports/sales_logs_import_service.rb
@@ -38,7 +38,7 @@ module Imports
       attributes["ownershipsch"] = ownership_from_type(attributes) if attributes["ownershipsch"].blank? # sometimes Ownership is missing, but type is set
       attributes["othtype"] = string_or_nil(xml_doc, "Q38OtherSale")
       attributes["jointpur"] = unsafe_string_as_integer(xml_doc, "joint")
-      attributes["jointmore"] = unsafe_string_as_integer(xml_doc, "JointMore") if attributes["jointpur"] == 1
+      attributes["jointmore"] = unsafe_string_as_integer(xml_doc, "JointMore") || 3 if attributes["jointpur"] == 1
       attributes["beds"] = safe_string_as_integer(xml_doc, "Q11Bedrooms")
       attributes["companybuy"] = unsafe_string_as_integer(xml_doc, "company") if attributes["ownershipsch"] == 3
       attributes["hholdcount"] = other_household_members(xml_doc, attributes)
@@ -509,7 +509,6 @@ module Imports
       attributes["hb"] ||= 4
       attributes["prevown"] ||= 3
       attributes["savingsnk"] ||= attributes["savings"].present? ? 0 : 1
-      attributes["jointmore"] ||= 3 if attributes["jointpur"] == 1
       attributes["inc1mort"] ||= 3
       if [attributes["pregyrha"], attributes["pregla"], attributes["pregghb"], attributes["pregother"]].all?(&:blank?)
         attributes["pregblank"] = 1
diff --git a/spec/services/imports/sales_logs_import_service_spec.rb b/spec/services/imports/sales_logs_import_service_spec.rb
index d74b24ce2..be271778c 100644
--- a/spec/services/imports/sales_logs_import_service_spec.rb
+++ b/spec/services/imports/sales_logs_import_service_spec.rb
@@ -1278,6 +1278,24 @@ RSpec.describe Imports::SalesLogsImportService do
           expect(sales_log&.socprevten).to be(10)
         end
       end
+
+      context "when it's a joint tenancy and jointmore is not answered" do
+        let(:sales_log_id) { "outright_sale_sales_log" }
+
+        before do
+          allow(logger).to receive(:warn).and_return(nil)
+        end
+
+        it "sets jointmore to don't know" do
+          sales_log_xml.at_xpath("//meta:status").content = "invalid"
+          sales_log_xml.at_xpath("//xmlns:joint").content = "1 Yes"
+          sales_log_xml.at_xpath("//xmlns:JointMore").content = ""
+          sales_log_service.send(:create_log, sales_log_xml)
+
+          sales_log = SalesLog.find_by(old_id: sales_log_id)
+          expect(sales_log&.jointmore).to eq(3)
+        end
+      end
     end
   end
 end