diff --git a/raddb/mods-config/sql/main/mysql/queries.conf b/raddb/mods-config/sql/main/mysql/queries.conf
index 0b3c210d6..740ac6d38 100644
--- a/raddb/mods-config/sql/main/mysql/queries.conf
+++ b/raddb/mods-config/sql/main/mysql/queries.conf
@@ -297,7 +297,8 @@ accounting {
 					acctinputoctets = '%{%{Acct-Input-Gigawords}:-0}' \
 						<< 32 | '%{%{Acct-Input-Octets}:-0}', \
 					acctoutputoctets = '%{%{Acct-Output-Gigawords}:-0}' \
-						<< 32 | '%{%{Acct-Output-Octets}:-0}' \
+						<< 32 | '%{%{Acct-Output-Octets}:-0}', \
+					acctstoptime = null \
 				WHERE acctsessionid     = '%{Acct-Session-Id}' \
 				AND username            = '%{SQL-User-Name}' \
 				AND nasipaddress        = '%{NAS-IP-Address}'"