diff --git a/script/import_scripts/base.rb b/script/import_scripts/base.rb
index aaef4efca4f..7bb49bcde9d 100644
--- a/script/import_scripts/base.rb
+++ b/script/import_scripts/base.rb
@@ -104,7 +104,9 @@ class ImportScripts::Base
     end
 
     # Some changes that should not be rolled back after the script is done
-    SiteSetting.purge_unactivated_users_grace_period_days = 60
+    if SiteSetting.purge_unactivated_users_grace_period_days > 0
+      SiteSetting.purge_unactivated_users_grace_period_days = 60
+    end
     SiteSetting.purge_deleted_uploads_grace_period_days = 90
 
     RateLimiter.disable
diff --git a/spec/script/import_scripts/base_spec.rb b/spec/script/import_scripts/base_spec.rb
index e7594d2fa56..a3b1199bb48 100644
--- a/spec/script/import_scripts/base_spec.rb
+++ b/spec/script/import_scripts/base_spec.rb
@@ -53,5 +53,12 @@ describe ImportScripts::Base do
     expect(Bookmark.count).to eq(5)
     expect(Post.count).to eq(5)
     expect(User.where('id > 0').count).to eq(1)
+    expect(SiteSetting.purge_unactivated_users_grace_period_days).to eq(60)
+  end
+
+  it "does not change purge unactivated users setting if disabled" do
+    SiteSetting.purge_unactivated_users_grace_period_days = 0
+    MockSpecImporter.new(import_data).perform
+    expect(SiteSetting.purge_unactivated_users_grace_period_days).to eq(0)
   end
 end