diff --git a/src/backend/optimizer/plan/subselect.c b/src/backend/optimizer/plan/subselect.c
index b55b230f3209512371aecd1c01fbf424296f3993..4fa7b057c4702be239299e3e315a4c3de3b145be 100644
--- a/src/backend/optimizer/plan/subselect.c
+++ b/src/backend/optimizer/plan/subselect.c
@@ -279,7 +279,8 @@ typedef struct CorrelatedVarWalkerContext
  *  Walker finds the deepest correlation nesting i.e. maximum levelsup among all
  *  vars in subquery.
  */
-static bool CorrelatedVarWalker(Node *node, CorrelatedVarWalkerContext *ctx)
+static bool
+CorrelatedVarWalker(Node *node, CorrelatedVarWalkerContext *ctx)
 {
 	Assert(ctx);
 
@@ -307,7 +308,8 @@ static bool CorrelatedVarWalker(Node *node, CorrelatedVarWalkerContext *ctx)
 /**
  * Returns true if subquery is correlated
  */
-bool IsSubqueryCorrelated(Query *sq)
+bool
+IsSubqueryCorrelated(Query *sq)
 {
 	Assert(sq);
 	CorrelatedVarWalkerContext ctx;
@@ -319,7 +321,8 @@ bool IsSubqueryCorrelated(Query *sq)
 /**
  * Returns true if subquery contains references to more than its immediate outer query.
  */
-bool IsSubqueryMultiLevelCorrelated(Query *sq)
+bool
+IsSubqueryMultiLevelCorrelated(Query *sq)
 {
 	Assert(sq);
 	CorrelatedVarWalkerContext ctx;