diff --git a/source/app/models/main.py b/source/app/models/main.py
index f9c12a9..1da228e 100644
--- a/source/app/models/main.py
+++ b/source/app/models/main.py
@@ -1708,7 +1708,7 @@ def _delete_emisor(rfc):
     cursor = con.cursor()
     sql = """
         DELETE FROM names
-        WHERE rfc = '?'"""
+        WHERE rfc = ?"""
     try:
         cursor.execute(sql, (rfc,))
     except Exception as e: