diff --git a/src/backend/catalog/heap.c b/src/backend/catalog/heap.c
index 9176f6280b..57df70f7b9 100644
--- a/src/backend/catalog/heap.c
+++ b/src/backend/catalog/heap.c
@@ -3195,6 +3195,10 @@ heap_truncate_one_rel(Relation rel)
 {
 	Oid			toastrelid;
 
+	/* Only certain relkinds have storage. */
+	if (rel->rd_rel->relkind != RELKIND_RELATION)
+		return;
+
 	/* Truncate the actual file (and discard buffers) */
 	RelationTruncate(rel, 0);