diff --git a/src/config.h b/src/config.h
index b120d92a..977406ba 100644
--- a/src/config.h
+++ b/src/config.h
@@ -97,7 +97,7 @@
 #define SQL_PREPARED_STMT_INSERT_INTO_SPHINX_TABLE   "INSERT INTO " SQL_SPHINX_TABLE " (`id`, `from`, `to`, `fromdomain`, `todomain`, `subject`, `body`, `arrived`, `sent`, `size`, `direction`, `folder`, `attachments`, `attachment_types`) values(?,?,?,?,?,?,?,?,?,?,?,?,?,?)"
 #define SQL_PREPARED_STMT_INSERT_INTO_META_TABLE     "INSERT INTO " SQL_METADATA_TABLE " (`from`,`fromdomain`,`subject`,`spam`,`arrived`,`sent`,`retained`,`size`,`hlen`,`direction`,`attachments`,`piler_id`,`message_id`,`reference`,`digest`,`bodydigest`,`vcode`) VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)"
 #define SQL_PREPARED_STMT_INSERT_INTO_ATTACHMENT_TABLE     "INSERT INTO " SQL_ATTACHMENT_TABLE " (`piler_id`,`attachment_id`,`sig`,`name`,`type`,`size`,`ptr`) VALUES(?,?,?,?,?,?,?)"
-#define SQL_PREPARED_STMT_GET_ATTACHMENT_ID_BY_SIGNATURE   "SELECT `id` FROM `" SQL_ATTACHMENT_TABLE "` WHERE `sig`=?"
+#define SQL_PREPARED_STMT_GET_ATTACHMENT_ID_BY_SIGNATURE   "SELECT `id` FROM `" SQL_ATTACHMENT_TABLE "` WHERE `sig`=? AND `ptr`=0"
 #define SQL_PREPARED_STMT_GET_ATTACHMENT_POINTER     "SELECT `piler_id`, `attachment_id` FROM " SQL_ATTACHMENT_TABLE " WHERE id=?"
 #define SQL_PREPARED_STMT_QUERY_ATTACHMENT           "SELECT `attachment_id`, `ptr` FROM " SQL_ATTACHMENT_TABLE " WHERE piler_id=? ORDER BY attachment_id ASC"
 #define SQL_PREPARED_STMT_GET_FOLDER_ID              "SELECT `id` FROM " SQL_FOLDER_TABLE " WHERE `name`=? AND `parent_id`=?"