diff --git a/src/backend/distributed/planner/multi_colocated_subquery_planner.c b/src/backend/distributed/planner/multi_planner_utils.c
similarity index 99%
rename from src/backend/distributed/planner/multi_colocated_subquery_planner.c
rename to src/backend/distributed/planner/multi_planner_utils.c
index 5dd088e1c..b7afe2f33 100644
--- a/src/backend/distributed/planner/multi_colocated_subquery_planner.c
+++ b/src/backend/distributed/planner/multi_planner_utils.c
@@ -1,5 +1,5 @@
 /*
- * multi_colocated_subquery_planner.c
+ * multi_planner_utils.c
  *
  * This file contains functions helper functions for planning
  * queries with colocated tables and subqueries.
@@ -11,7 +11,7 @@
 #include "postgres.h"
 #include "c.h"
 
-#include "distributed/multi_colocated_subquery_planner.h"
+#include "distributed/multi_planner_utils.h"
 #include "distributed/multi_planner.h"
 #include "distributed/multi_logical_planner.h"
 #include "distributed/pg_dist_partition.h"
diff --git a/src/backend/distributed/planner/multi_router_planner.c b/src/backend/distributed/planner/multi_router_planner.c
index c0aba493f..a263d8ed1 100644
--- a/src/backend/distributed/planner/multi_router_planner.c
+++ b/src/backend/distributed/planner/multi_router_planner.c
@@ -34,7 +34,7 @@
 #include "distributed/multi_logical_optimizer.h"
 #include "distributed/multi_physical_planner.h"
 #include "distributed/multi_router_planner.h"
-#include "distributed/multi_colocated_subquery_planner.h"
+#include "distributed/multi_planner_utils.h"
 #include "distributed/listutils.h"
 #include "distributed/citus_ruleutils.h"
 #include "distributed/relay_utility.h"
diff --git a/src/include/distributed/multi_colocated_subquery_planner.h b/src/include/distributed/multi_colocated_subquery_planner.h
deleted file mode 100644
index 28f80426a..000000000
--- a/src/include/distributed/multi_colocated_subquery_planner.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * multi_colocated_subquery_planner.h
- *
- * This file contains functions helper functions for planning
- * queries with colocated tables and subqueries.
- *
- * Copyright (c) 2017-2017, Citus Data, Inc.
- *
- *-------------------------------------------------------------------------
- */
-
-#ifndef MULTI_COLOCATED_SUBQUERY_PLANNER_H
-#define MULTI_COLOCATED_SUBQUERY_PLANNER_H
-
-#include "distributed/multi_planner.h"
-
-
-extern bool AllRelationsJoinedOnPartitionKey(PlannerRestrictionContext *
-											 plannerRestrictionContext);
-
-
-#endif /* MULTI_COLOCATED_SUBQUERY_PLANNER_H */