diff --git a/sessionctx/variable/tidb_vars.go b/sessionctx/variable/tidb_vars.go
index faf116a2632ae..e361a6fd49e91 100644
--- a/sessionctx/variable/tidb_vars.go
+++ b/sessionctx/variable/tidb_vars.go
@@ -939,7 +939,7 @@ const (
 	DefBroadcastJoinThresholdCount                 = 10 * 1024
 	DefTiDBOptimizerSelectivityLevel               = 0
 	DefTiDBOptimizerEnableNewOFGB                  = false
-	DefTiDBEnableOuterJoinReorder                  = false
+	DefTiDBEnableOuterJoinReorder                  = true
 	DefTiDBEnableNAAJ                              = false
 	DefTiDBAllowBatchCop                           = 1
 	DefTiDBAllowMPPExecution                       = true