diff --git a/src/include/distributed/multi_physical_planner.h b/src/include/distributed/multi_physical_planner.h
index 68831294a..c4d662d5f 100644
--- a/src/include/distributed/multi_physical_planner.h
+++ b/src/include/distributed/multi_physical_planner.h
@@ -351,7 +351,6 @@ extern List * TaskListDifference(const List *list1, const List *list2);
 extern List * AssignAnchorShardTaskList(List *taskList);
 extern List * FirstReplicaAssignTaskList(List *taskList);
 extern List * RoundRobinAssignTaskList(List *taskList);
-extern List * RoundRobinPerTransactionAssignTaskList(List *taskList);
 extern int CompareTasksByTaskId(const void *leftElement, const void *rightElement);
 
 /* function declaration for creating Task */