diff --git a/scripts/migrations/2026-10-14-site-map.py b/scripts/migrations/2026-10-14-site-map.py
index f497369..af90976 100644
--- a/scripts/migrations/2026-10-14-site-map.py
+++ b/scripts/migrations/2026-10-14-site-map.py
@@ -53,7 +53,7 @@ def definitions(sites_id, models_id):
         "fields": [
             site, model,
             {"name": "file", "type": "file", "required": True, "maxSelect": 1, "maxSize": 1048576,
-             "mimeTypes": ["text/csv", "text/plain", "application/vnd.ms-excel"], "protected": True},
+             "mimeTypes": ["text/csv", "text/plain", "text/tab-separated-values", "application/vnd.ms-excel"], "protected": True},
             {"name": "matched", "type": "number", "required": False},
             {"name": "unmatched", "type": "json", "required": False, "maxSize": 200000},
             {"name": "user", "type": "text", "required": False, "max": 50},
diff --git a/scripts/migrations/test_2026_10_14_site_map.py b/scripts/migrations/test_2026_10_14_site_map.py
index 4b31838..87fbeaf 100644
--- a/scripts/migrations/test_2026_10_14_site_map.py
+++ b/scripts/migrations/test_2026_10_14_site_map.py
@@ -39,3 +39,11 @@ class SiteMapMigrationTests(unittest.TestCase):
 
 if __name__ == "__main__":
     unittest.main()
+
+
+
+class SurveyFileTypes(unittest.TestCase):
+    def test_survey_file_accepts_tab_separated(self):
+        defs = {d["name"]: d for d in migration.definitions("sites0", "models0")}
+        f = next(x for x in defs["site_survey_imports"]["fields"] if x["name"] == "file")
+        self.assertIn("text/tab-separated-values", f["mimeTypes"])