diff --git a/ydb/library/yql/minikql/comp_nodes/mkql_grace_join.cpp b/ydb/library/yql/minikql/comp_nodes/mkql_grace_join.cpp
index 9f5316e97f72..b25a1408a8ff 100644
--- a/ydb/library/yql/minikql/comp_nodes/mkql_grace_join.cpp
+++ b/ydb/library/yql/minikql/comp_nodes/mkql_grace_join.cpp
@@ -1116,7 +1116,7 @@ IComputationNode* WrapGraceJoinCommon(TCallable& callable, const TComputationNod
 
     const auto flowLeft = dynamic_cast<IComputationWideFlowNode*> (LocateNode(ctx.NodeLocator, callable, 0));
     IComputationWideFlowNode* flowRight = nullptr;
-    if (isSelfJoin) {
+    if (!isSelfJoin) {
         flowRight = dynamic_cast<IComputationWideFlowNode*> (LocateNode(ctx.NodeLocator, callable, 1));
     }