diff --git a/schema/mysql/get_sla_ok_percent.sql b/schema/mysql/get_sla_ok_percent.sql
index faadb0f..80fdbf9 100644
--- a/schema/mysql/get_sla_ok_percent.sql
+++ b/schema/mysql/get_sla_ok_percent.sql
@@ -54,7 +54,7 @@ SELECT
       WHEN in_downtime + out_of_slatime > 0 THEN 1
       WHEN is_problem THEN 0
       ELSE 1
-    END * duration)
+    END * duration
   ) AS sla_ok_seconds,
   @sla_ok_percent := CAST(100 * SUM(
     CASE