diff --git a/src/mod_offline_sql.erl b/src/mod_offline_sql.erl
index cb0efa51e..972316954 100644
--- a/src/mod_offline_sql.erl
+++ b/src/mod_offline_sql.erl
@@ -94,7 +94,7 @@ remove_old_messages(Days, LServer) ->
                    ejabberd_sql:sql_query_t(
                      ?SQL("DELETE FROM spool"
                           " WHERE created_at <"
-                          " NOW() - INTERVAL '%(Days)d DAY'"));
+                          " NOW() - %(Days)d * INTERVAL '1 DAY'"));
               (_, _) ->
                    ejabberd_sql:sql_query_t(
                      ?SQL("DELETE FROM spool"