diff --git a/src/include/nodes/relation.h b/src/include/nodes/relation.h
index 1e9fed9..963b022 100644
--- a/src/include/nodes/relation.h
+++ b/src/include/nodes/relation.h
@@ -487,7 +487,7 @@ typedef enum RelOptKind
 	((reloptkind) == RELOPT_OTHER_MEMBER_REL || \
 	 (reloptkind) == RELOPT_OTHER_JOINREL)
 
-typedef struct PartitionOptInfo PartitionOptInfo;
+typedef struct PartitionOptInfo;
 
 typedef struct RelOptInfo
 {
@@ -561,7 +561,7 @@ typedef struct RelOptInfo
 	/*
 	 * TODO: Notice recursive usage of RelOptInfo.
 	 */
-	PartitionOptInfo	*part_info;
+	struct PartitionOptInfo	*part_info;
 
 	/* Set only for "other" base or join relations. */
 	Relids		parent_relids;