diff --git a/workflow/scripts/map_opentol.py b/workflow/scripts/map_opentol.py
index deb8676..cc7a08e 100644
--- a/workflow/scripts/map_opentol.py
+++ b/workflow/scripts/map_opentol.py
@@ -155,6 +155,7 @@ def postprocess_db(database):
     cursor.execute("""CREATE INDEX IF NOT EXISTS country_idx ON barcode (country)""")
     cursor.execute("""CREATE INDEX IF NOT EXISTS nucraw_idx ON barcode (nucraw)""")
     cursor.execute("""CREATE INDEX IF NOT EXISTS processid_idx ON barcode (processid)""")
+    cursor.execute("""CREATE INDEX IF NOT EXISTS country_idx ON barcode (country)""")
     conn.commit()
     conn.close()